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| Number | Title | Issue Date |
| 8013494 | Vibration actuator driving device, lens barrel, camera, method of manufacturing electromechanical conversion element, method of manufacturing vibration actuator, and method of driving vibration actuator A vibration actuator driving device includes a plurality of wiring sections and a supply controller. The plurality of wiring sections are disposed correspondingly to a plurality of electrically independent electrodes of an electromechanical conversion element. The w... | 09/06/2011 |
| 8008839 | System and method of providing a thermally stabilized fixed frequency piezoelectric optical modulator A device for generating controlled vibration in an uncontrolled temperature environment includes a driving circuit that generates a signal having a first frequency and has a temperature-sensitive driving unit, a vibratory element coupled to the driving unit that vib... | 08/30/2011 |
| 7898146 | Drive unit A drive unit includes a vibration actuator for controlling the piezoelectric element. A control section controls the vibration actuator switchably between a normal operation mode in which the piezoelectric element vibrates at a predetermined frequency to let the vib... | 03/01/2011 |
| 7701115 | Drive unit A drive unit includes a control unit for controlling an ultrasonic actuator. The control unit performs switching between a normal operation mode in which the piezoelectric element unit vibrates at a frequency close to a resonance frequency of longitudinal vibration ... | 04/20/2010 |
| 7573179 | Driving method of liquid drop ejecting head and liquid drop ejecting apparatus Disclosed herein is a driving method of a liquid drop ejecting head in which an oscillatory wave is imparted to a liquid accommodated in a pressure chamber using an electromechanical transducer, which is driven by applying a predetermined driving waveform to the ele... | 08/11/2009 |
| 7444209 | Miniature cooling device A method for regulating temperature in an enclosure is disclosed. The method involves monitoring a component temperature inside the enclosure. When the component temperature reaches a threshold, the method injects a coolant into the enclosure. The method further inv... | 10/28/2008 |
| 7378781 | Acoustic wave resonator with integrated temperature control for oscillator purposes The present invention relates to a resonator structure, temperature compensation method and temperature control apparatus for controlling local temperature of a resonator structure. At least one heating element (55) is integrated on a substrate of the resonat... | 05/27/2008 |
| 7358644 | Method for controlling an actuator and control device belonging thereto A method for the electric control of an actuator, especially a piezoelectric actuator of an injection system comprises the following steps: charging the actuator; waiting during a specific period of time (D1, D2) and discharging the actuator after the ... | 04/15/2008 |
| 7357474 | Method of controlling an inkjet printhead, an inkjet printhead suitable for use of said method, and an inkjet printer comprising said printhead A method of controlling an inkjet printhead containing a substantially closed duct in which ink is situated, said duct having at least one exit opening for the ink, wherein an actuation pulse is applied to an electro-mechanical transducer so that the pressure in the... | 04/15/2008 |
| 7271520 | Piezo actuator driving circuit The present invention relates to a piezo actuator driving circuit. The piezo actuator driving circuit includes a pulse generator that generates a first voltage pulse with a constant period; a first driver stage that receives the first voltage pulse of the pulse gene... | 09/18/2007 |
| 7254990 | Machine fluid sensor A sensor for sensing one or more properties of a vehicle fluid has a tuning fork resonator adapted to contact the fluid. The tuning fork resonator comprises two tines and is operable to oscillate so that the two tines move in opposite phase at a frequency of less th... | 08/14/2007 |
| 7215214 | Resonator and amplifying oscillator circuit having a high resolution skew-compensated frequency synthesizer integrated on a single substrate An oscillator circuit is provided having an oscillating amplifier circuit connected to a resonator. The oscillator/amplifier and resonator are preferably fabricated on a single die using semiconductor fabrication tools. Included with the circuitry is a temperature s... | 05/08/2007 |
| 7211926 | Temperature compensated oscillator including MEMS resonator for frequency control Disclosed is an oscillator that relies on redundancy of similar resonators integrated on chip in order to fulfill the requirement of one single quartz resonator. The immediate benefit of that approach compared to quartz technology is the monolithic integration of th... | 05/01/2007 |
| 7209401 | Ring oscillator dynamic adjustments for auto calibration An apparatus compensates for voltage and temperature variations on an integrated circuit with: a voltage sensor having a digital voltage output; a temperature sensor having a digital temperature output; a register coupled to the voltage sensor and the temperature se... | 04/24/2007 |
| 7209074 | Temperature compensation improvements in radar apparatus A radar-based distance measurement apparatus comprises a microwave circuit comprising a frequency generator which produces a microwave frequency signal, the frequency of which is modulated by an amount determined by a modulation signal applied to the frequency gener... | 04/24/2007 |
| 7190102 | Apparatus and method for charging and discharging a capacitor to a predetermined setpoint An apparatus using electrically-stimulated smart material requires a power source to stimulate the material. This power source has three main functions, (1) to apply a known voltage potential across the smart material, (2) to convert from the control voltage to a le... | 03/13/2007 |
| 7166978 | Motor temperature sensor system and method to determine motor performance An electric motor system includes an electric motor, a temperature sensor mounted therein capable of measuring a local temperature and generating a temperature related signal, and a processor configured to calculate an actual temperature of a rotor magnet from the t... | 01/23/2007 |
| 7154351 | Approximate n-th order function generating device and temperature compensation crystal oscillation circuit A circuit for generating a component of n-th order includes: six differential amplifiers (15A to 15F) having a pair of input terminals supplied with a common linear input signal and a constant level signal of a predetermined level, outputting a reverse... | 12/26/2006 |
| 7119478 | Piezoelectric step-motion actuator A step-motion actuator using piezoelectric material to launch a flight mass which, in turn, actuates a drive pawl to progressively engage and drive a toothed wheel or rod to accomplish stepped motion. Thus, the piezoelectric material converts electrical energy into ... | 10/10/2006 |
| 7098748 | Integrated CMOS high precision piezo-electrically driven clock A clock oscillator embedded in an integrated circuit, including a piezoelectric resonator formed on the integrated circuit; a clock generator coupled to the on-chip piezoelectric resonator, one or more sensors adapted to sense one or more environmental parameters af... | 08/29/2006 |
| 7093775 | Fragrance-dispensing shower head A fragrance dispensing shower head apparatus includes a shower head including proximal and distal end portions and a central bore extending therebetween. The proximal end portion has a threaded inner surface. The shower head further includes a wire-mesh screen trave... | 08/22/2006 |
| 7068557 | Ring oscillator dynamic adjustments for auto calibration An apparatus compensates for voltage and temperature variations on an integrated circuit with: a voltage sensor having a digital voltage output; a temperature sensor having a digital temperature output; a register coupled to the voltage sensor and the temperature se... | 06/27/2006 |
| 7064617 | Method and apparatus for temperature compensation Temperature compensation is achieved by adjusting a divide ratio of a multi-modulus divider circuit in a feedback path of a phase-locked loop based on the detected temperature. The divide ratio is adjusted based on stored adjustment values stored in non-volatile mem... | 06/20/2006 |
| 7040154 | Motion sensing for tire pressure monitoring A motion sensor system for a tire pressure monitoring system (TPMS) that uses a piezoelectric sensor to sense vibration as an indication of wheel motion. The TPMS uses the detected vibration to transition between operation modes. In one embodiment, the TPMS has a mo... | 05/09/2006 |
| 7034436 | Device to control a piezoelectric actuator A device for controlling a piezoelectric actuator (Cp), in particular for a fuel-injection valve of an internal combustion engine, comprises an energy source (EQ), which supplies the actuator (Cp) with energy (E0), whereby the extension of the piezoelectric a... | 04/25/2006 |
| 7025499 | Device for testing a material that changes shape when an electric and/or magnetic field is applied A device for testing a material that changes shape when an electric and/or magnetic field is applied, in particular a piezoactive material, having a generator to generate an electric field and/or a magnetic field is described. This permits a rapid characterization o... | 04/11/2006 |
| 6979933 | Apparatus and method for charging and discharging a capacitor An apparatus for electrically stimulating a smart material includes a controllable power source for charging the smart material and/or switching circuitry for discharging the smart material. The controllable power source includes a regulated DC to DC converter havin... | 12/27/2005 |
| 6957565 | Method and apparatus for characterizing materials by using a mechanical resonator A method for measuring properties of a fluid that includes oscillating a tuning fork resonator in a fluid. The invention is particularly suitable for in-line monitoring of various physical and electrical properties of fluids flowing in a conduit. ... | 10/25/2005 |
| 6933985 | Apparatus and method for compensation of temperature drift of SAW filters The invention relates to a method of controlling the operation of a voltage controlled oscillator (VCO) with respect to a SAW filter (6) within a broadcast data receiver (BDR) (104). Over time, it is found that during normal operation of the BDR (10... | 08/23/2005 |
| 6933661 | Self cooling piezo actuator for high temperature applications A piezoelectric actuator and a method of assembling and employing a piezoelectric actuator. This method comprises the steps of positioning an expandable piezoelectric material inside a case, and enclosing a vaporizable liquid in the case. The case is positioned in a... | 08/23/2005 |
| 6908638 | Organic electroluminescent element and method of manufacturing same The purpose of the invention is to provide an organic electroluminescent element having stable luminescent characteristics with a low luminescence starting voltage and without non-luminescing black spots in the luminescing surface. The invention relates to a method ... | 06/21/2005 |
| 6885131 | Method for controlling a piezoelectric actuator which is used to displace an element The invention relates to the return stroke between an actuator and an element. In order to displace the element the actuator (A) is impinged upon by a control voltage (ANS). The control voltage (ANS) is selected in such a manner that it is dependent on the size of r... | 04/26/2005 |
| 6847271 | Component having an acoustically active material for tuning during operation A component having an acoustically active material, whose acoustic constants can be at least partially altered. The acoustically active material is located at least partially at a phase transition point and/or in the vicinity of a phase transition point. ... | 01/25/2005 |
| 6794795 | Method and apparatus for exciting a piezoelectric material Apparatus and methods for exciting a piezoelectric device. A control device receives a first control signal excites the piezoelectric device at about at least one predetermined electrical resonant frequency of the piezoelectric device as a function of the first cont... | 09/21/2004 |
| 6781472 | Pseudo-cubic function generator circuit A pseudo-cubic function generator circuit comprises a CMOS inverter which is applied with a detected voltage of a sensor and supplied with a power supply voltage, and a voltage divider circuit for dividing the power supply voltage, wherein an output terminal of the ... | 08/24/2004 |
| 6756880 | Reader and response control system for discrimination between multiple surface acoustic wave identification tags and method of operation thereof A system for discriminating between coded responses from multiple SAW identification tags and a method of operating such system. In one embodiment the system provides for a SAW tag reader subsystem that detects coded responses from the tags to an interrogation pulse... | 06/29/2004 |
| 6727635 | Driving device A smooth impact drive mechanism utilizing an electromechanical conversion element, in which a preheating voltage to preheat the electromechanical conversion element is impressed thereto before the impression of a drive voltage to the electromechanical conversion ele... | 04/27/2004 |
| 6717328 | Piezoelectric resonator and FM detection circuit incorporating the same In a piezoelectric resonator, the temperature coefficient εTC of the capacitance of the piezoelectric material, the bandwidth ratio Δf/fo, the temperature coefficient FrTC of the resonance frequency, the temperature coefficient FaTC | 04/06/2004 |
| 6707347 | Crystal oscillator that utilizes the power transistor of an output amplifier to heat the crystal resonator A crystal oscillator according to the present invention prevents abnormal oscillation at a temperature in a low-temperature area equal to or lower than an ordinary temperature. The crystal oscillator is configured such that a crystal vibrator is made to abut against... | 03/16/2004 |
| 6706977 | Self-monitoring controller for quartz crystal microbalance sensors A controller for a quartz crystal microbalance (QCM) sensor system and method for detecting mass deposition on a QCM sensor. The controller controls a QCM using temperature-, voltage- and current-regulating circuits, a microcontroller, an oscillator, heating and coo... | 03/16/2004 |
