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| Number | Title | Issue Date |
| 7936107 | Drive wave generation circuit To generate a drive wave for driving a piezo-actuator. Drive data concerning the number of drive waves supplied through a serial bus is stored in a drive data storage unit. A comparing circuit detects whether or not the number of drive waves have been generated, the... | 05/03/2011 |
| 7868518 | Device for processing workpieces A device for processing workpieces uses ultrasound, with an resonant system comprising an ultrasound generator, an ultrasound sonotrode, and an anvil, wherein a workpiece is processed between the anvil and the ultrasound sonotrode. The ultrasound generator comprises... | 01/11/2011 |
| 7602100 | Driving method and driving device for standing-wave-type ultrasonic actuator The invention provides a driving method and driving device for a standing-wave-type ultrasonic actuator which can prevent falling of and eliminate unstable motion of a driven body during activation, and which can shorten the time for the driven body to stop moving w... | 10/13/2009 |
| 7579750 | Ultrasonic motor An ultrasonic motor includes a stator that includes a comb body with a plurality of circumferentially-arranged comb-like projections and a piezoelectric body integrally mounted on the comb body, a rotor rotatable with respect to the stator, the rotor having a contac... | 08/25/2009 |
| 7550896 | Piezoelectric actuator system with position detection function and method thereof A piezoelectric actuator system with a position detection function includes an immovable base, a piezoelectric material, a drive shaft, and a movable part. The immovable base has a driving circuit for providing a driving voltage. The piezoelectric material is fixed ... | 06/23/2009 |
| 7535153 | Drive control method for a piezoelectric actuator, drive control apparatus for a piezoelectric actuator, and electronic device The piezoelectric actuator drive control device has a controller, and executes an initialization process including an optimum phase difference acquisition process P1 and a phase difference inversion detection process P4 at a predetermined frequency. As... | 05/19/2009 |
| 7439650 | Piezoactuator drive detection device and electronic device To provide a drive detection means for a piezoelectric actuator that can detect an amount driven without requiring adding an encoder or other component while also preventing increasing the load. A rotor is disposed eccentrically to the axis of rotation to change the... | 10/21/2008 |
| 7382080 | Piezoelectric ultrasonic motor driver The present invention provides a piezoelectric ultrasonic motor driver which can perform self-oscillation, adjust the rotational direction of the motor, and be easy to manufacture. The motor includes a metal body having a desired shape; a plurality of piezoelectric ... | 06/03/2008 |
| 7375455 | Ultrasonic motor driving device and ultrasonic diagnosis apparatus An ultrasonic motor drive device capable of prolong the service life of an ultrasonic motor by preventing the motor from being unstably operated when the motor is driven at a lower speed of at least two speeds. When the ultrasonic motor (3) is driven at a rather low... | 05/20/2008 |
| 7365474 | Driving system for vibrating type actuator and method of driving vibrating type actuator Provided is a driving system for a vibrating type actuator capable of simplifying a driving circuit. A vibrating body of the vibrating type actuator can generate a first mode and a second mode which are different in a vibration form, in accordance with an alternate ... | 04/29/2008 |
| 7352108 | Piezoelectric driving device and a regulation method for a piezoelectric driving device A piezoelectric driving device and a regulation method for a piezoelectric driving device are proposed. Piezoelectric driving devices known so far show a characteristic with which the electric power applied to the motor drops when the load increases. This behavior, ... | 04/01/2008 |
| 7348708 | Drive method for piezoelectric actuator, drive apparatus for piezoelectric actuator, electronic device, control program for drive apparatus for piezoelectric actuator, and recording medium The frequency of a drive signal supplied to a piezoelectric actuator 91 is swept within a specific range, the consumption current of the piezoelectric actuator 91 is determined, and when the consumption current is equal to or greater than a reference v... | 03/25/2008 |
| 7339305 | Piezoelectric actuator drive apparatus, electronic device, driving method thereof, drive control program thereof, and storage medium in which program is stored The control circuit (131) causes drive frequency modification to be re-executed after returning the drive frequency to the prescribed drive frequency when the reduction rate of the power source voltage is higher than the standard reduction rate; specifically,... | 03/04/2008 |
| 7331005 | Semiconductor circuit device and a system for testing a semiconductor apparatus Methods and apparatus for testing a semiconductor device. A testing interface is configured to interface with an external test apparatus and a device under test (DUT). In one embodiment, the testing interface receives test data and a test clock signal from the exter... | 02/12/2008 |
| 7321182 | Oscillatory-wave actuator and method for driving oscillatory-wave actuator An oscillatory-wave actuator is provided capable of simplifying the structure of a driving circuit. Push-up vibration is formed in an oscillating body including three piezoelectrics and an elastic body by applying an AC voltage to the first piezoelectric. The second... | 01/22/2008 |
| 7312554 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) senses a parameter of a piezoelectric actuator (14) operating in a device (10) and adjusts a drive signal of the piezoelectric actuator in accordance with the parameter. The drive circuit comprises a controller (100) ... | 12/25/2007 |
| 7298066 | Drive apparatus for piezoelectric actuator, drive method for piezoelectric actuator, electronic device, control program for drive apparatus for piezoelectric actuator, and recording medium A drive apparatus for a piezoelectric actuator prevents locking drive frequency in a state of resonance due to harmonics. There is no need to provide external components to filter, and circuitry can easily be reduced in size. The drive apparatus has a phase differen... | 11/20/2007 |
| 7290993 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) produces a drive signal having a waveform of a predetermined waveform shape for a device (10) having a piezoelectric actuator (14). The drive circuit (14) includes a memory (140) which stores waveform shape dat... | 11/06/2007 |
| 7287965 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) produces a drive signal for a pump (10) having a piezoelectric actuator (14), with the piezoelectric actuator (14) forming a part of the drive circuit (18) and serving to shape a waveform of the drive signal. T... | 10/30/2007 |
| 7271522 | Driving device and driving method A driving device of the disclosure has an electromechanical transducer that extends and contracts upon application of voltage thereto and a support member that slidably supports a movable body and is displaced with the electromechanical transducer to which the suppo... | 09/18/2007 |
| 7267043 | Actuators with diaphragm and methods of operating same Actuator assemblies comprise an actuator element and two piezoelectric assemblies, with the two piezoelectric assemblies being configured and arranged for controlling movement of the actuator element. In some example implementations, the first piezoelectric assembly... | 09/11/2007 |
| 7247970 | Drive method for piezoelectric actuator, drive apparatus for piezoelectric actuator, electronic device, control program for drive apparatus for piezoelectric actuator, and recording medium A frequency of a drive signal supplied to a piezoelectric element is swept within a specific range, a detection signal indicating the vibrating state of a vibrating member is detected, and the sweep speed of the drive signal frequency supplied to the piezoelectric e... | 07/24/2007 |
| 7245058 | Vibration wave driving apparatus, and method of setting shape of support member supporting elastic member forming vibration member of vibration wave driving apparatus A vibration wave driving apparatus includes a vibration member in which an electro-mechanical energy conversion element is fixed to an elastic member, and a contact member pressed against a sliding part provided in the vibration member, so as to be kept in contact t... | 07/17/2007 |
| 7215062 | Ultrasonic motor and electronic appliance with ultrasonic motor An ultrasonic motor constructed so as to have improved driving force, reduced vibrational loss and smaller dimensions as compared with the conventional art. A piezoelectric vibrator generates a vibrational driving force in response to a received drive signal. A driv... | 05/08/2007 |
| 7193351 | Driving device and driving method A rod is sawtooth-like vibrated by cyclically applying, to a piezoelectric element, voltage values which are stepwise and sequentially increased or decreased, so that a moving unit is driven along the rod in one direction or the opposite direction. The sequentially ... | 03/20/2007 |
| 7190104 | Device and method utilizing electromechanical conversion element To provide a driving device, utilizing an electromechanical conversion element, having a driving pulse generating means capable of generating a sawtooth waveform driving voltage with a simple circuit configuration. The driving device includes: an electromechanical c... | 03/13/2007 |
| 7183691 | Control apparatus for vibration type actuator and control method thereof There are provided a control apparatus for a vibration type actuator and a control method thereof, which are capable of efficiently driving the vibration type actuator regardless of changes in characteristic of the vibration type actuator, in load, and in characteri... | 02/27/2007 |
| 7183738 | Motor control device A speed control means 7 for outputting a drive command signal for a motor 1 to make the speed of the motor 1 conform to the speed command signal based on a signal indicating the difference between the speed command signal and the detected speed ... | 02/27/2007 |
| 7161277 | Driving device In a drive apparatus having a vibration-generator including a plurality of electromechanical conversion elements, a plurality of weights located between each of the electromechanical conversion elements, and a rod fixed to one end of an electromechanical conversion ... | 01/09/2007 |
| 7154210 | Driving device The driving device has a piezoelectric element 32, a supporting member 16 fixed to one end of the piezoelectric element 32, a driving shaft 18 fixed to the other end of the piezoelectric element 32, a movable member 20 that ... | 12/26/2006 |
| 7154208 | Control apparatus for vibration type actuator The present invention relates to apparatus achieving improvement in operation characteristics in the operation of stopping or reversing the direction of or decelerating movement of a vibrating wave actuator constructed to apply an alternating voltage to an electro-m... | 12/26/2006 |
| 7148605 | Biaxial piezoelectric motor A piezoelectric motor that allows movement of an arbitrary object in an arbitrary direction is described. The piezoelectric motor includes at least two piezoelectric drives positioned to direct energy at an angle to each other. A contact element translates the energ... | 12/12/2006 |
| 7129618 | Control apparatus capable of low-speed driving of vibration type driving apparatus, actuating apparatus using the control apparatus, control method capable of low-speed driving of vibration type driving apparatus, and storage medium storing program including program codes capable of realizing the control method A control apparatus and a control method for a vibration type driving apparatus are disclosed which can maintain output performance even when low-speed driving is continued for a long time. The vibration type driving apparatus comprises a vibrating body and an elect... | 10/31/2006 |
| 7119475 | Driving method of piezoelectric actuator, driving apparatus of piezoelectric actuator, electronic watch, electronics, control program of piezoelectric actuator, and storage medium A drive device for a piezoelectric actuator, wherein the time needed to achieve highly efficient drive conditions is shortened to reduce power consumption, and stabilized control can be performed. The device has a phase difference detection device (phase difference/... | 10/10/2006 |
| 7116037 | Rotary drive device A rotary drive device is configured to be reduced in size while still delivering a prescribed torque. The rotary drive device has a base part with a vibrating body and a rotating body attached to the base part. The vibrating body has at least one piezoelectric eleme... | 10/03/2006 |
| 7088063 | Motor drive device and integrated circuit device for motor driving A three-phase DC motor output stage including a predriver that supplies drive voltages to power MOSFETs supplies output voltages to three-phase coils, monitors whether each of gate-to-source voltages of the power MOSFETs is greater than or equal to a predetermined v... | 08/08/2006 |
| 7085484 | Driving device, position controller provided with driving device, and camera provided with position controller A driving device for an ultrasonic actuator for driving a movable member is provided with a member sensor for detecting a present position of the movable member, a calculator for calculating a control target position of the movable member, a driving circuit for gene... | 08/01/2006 |
| 7084549 | Driver of piezoelectric actuator To make it possible to sustain a low power consumption for the entire driver in a driver of a piezoelectric actuator, by reducing the number of components and switching the piezoelectric actuator at a high speed. Common resistors Ra and Rb for current limitation are... | 08/01/2006 |
| 7071595 | Translation and rotation positioning motor A positioning device provides the capability of moving an object in both a linear and a rotational direction. The positioning device includes a first piezo stack with plural piezo plates that are capable of movement in orthogonal directions with respect to each othe... | 07/04/2006 |
| 7061156 | Control apparatus for vibration type actuator The present invention relates to apparatus achieving improvement in operation characteristics in the operation of stopping or reversing the direction of or decelerating movement of a vibrating wave actuator constructed to apply an alternating voltage to an electro-m... | 06/13/2006 |
