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Class 310/359 - More than one poling direction (e.g., Rosen transformer)


Subclass of Class 310 - Electrical generator or motor structure
Definition: Subject matter wherein a piezoelectric element is polarized
No. of patents: 280
Last issue date: 05/08/2012


1              
NumberTitleIssue Date
8174169Piezoelectric transformer
A piezoelectric transformer with a body that includes a first functional part and a second functional part is disclosed. The second functional part has inner electrodes, located in the body, which are connected to outer electrodes of this part. The first outer elect...
05/08/2012
7932663Piezoelectric transformer with pinwheel type electrode
Disclosed herein is a piezoelectric transformer having a pinwheel-type electrode. The piezoelectric transformer of the present invention includes a body, an upper electrodes and a lower electrode. The body is formed in a circular planar shape and is made of a piezoe...
04/26/2011
7723902Piezoelectric transformer and method for the production thereof
A piezoelectric transformer includes a base body. The base body includes an input part and an output part mechanically connected to the input part. The base body also includes internal electrodes perpendicular to a polarization axis of the transformer-in the input p...
05/25/2010
7579760Vibrator and production method therefor
A vibrator includes a vibrating body having a substantially quadrangular prism shape and including four side surfaces extending in the longitudinal direction of the vibrating body. A common electrode is formed on substantially an entire surface of one of the side su...
08/25/2009
7550903Method and device for polarizing a piezoelectric actuator
In a method and device for polarizing a piezoelectric actuator according to which high-frequency pulse voltages can be used for polarizing the actuators an actuator to be polarized is mounted between two retaining elements while connected in series to a second piezo...
06/23/2009
7504765Piezoelectric transformer and the method for manufacturing the same
A small, thin, light piezoelectric transformer capable of large-capacity output is provided at low cost. In piezoelectric transformers adjacent to each other in the row direction, a lower electrode extends in the column direction in a supporting substrate, so as to ...
03/17/2009
7453189Piezoelectric transformer
There is provided with a piezoelectric transformer which does not require a marking operation, is easy to manufacture, and is capable of reducing costs. After the piezoelectric transformer is manufactured, a shape of secondary side electrodes on the outer end is mad...
11/18/2008
7439659Piezoelectric actuator, droplet ejection apparatus, and manufacturing method thereof
The piezoelectric actuator comprises: a plate-shaped piezoelectric body which has a portion polarized in a thickness direction of the piezoelectric body and a portion polarized in a direction oblique to the thickness direction; and a pair of electrodes which are dis...
10/21/2008
7439630System and methodology for generating electricity using a chemical heat engine and piezoelectric material
A system for generating electrical power supply signals includes at least one heat engine having a chamber that undergoes heating/cooling cycle and corresponding pressure variations. At least one piezoelectric transducer is deformed in response to the pressure varia...
10/21/2008
7423362Piezoelectric transformer drive method and drive circuit
A driving circuit is composed of a discontinuous rectangle wave oscillator and a lowpass filter. A discontinuous rectangle wave used herein is composed of voltages Vp, 0 and −Vp. Assuming one cycle is T, a discontinuous rectangle wave has such a configuration that...
09/09/2008
7411340Piezoelectric transformer
A piezoelectric transformer with a base body is specified that has an input part and an output part, wherein at least three groups of internal electrodes are contained in at least one of these parts. The internal electrodes of each group are interconnected in an ele...
08/12/2008
7405512Acoustic transducers having localized ferroelectric domain inverted regions
An acoustic transducer comprises a ferroelectric crystal having a plurality of spaced apart ferroelectric domain inverted regions and at least one non-inverted region. An electrode layer is disposed on one side of the crystal electrically contacting both the domain ...
07/29/2008
7353585Method of poling ferroelectric materials
A method of producing an actuator includes shaping a block of ferroelectric material to provide an active element of the actuator. The element includes a stack of ferroelectric layers with adjacent layers separated by electrodes arranged parallel to end faces of the...
04/08/2008
7355326Piezoelectric transformer
A piezoelectric transformer, which operates in a half wavelength mode, includes an input part having input electrodes laminated in a thickness direction on a central part in a longitudinal direction of a piezoelectric element with rectangular shape, in which the inp...
04/08/2008
7336022Piezoelectrical bending converter
Piezoelectrical bending converter with at least one monolithic layered composite, includes a piezoelectric-active ceramic layer with a lateral dimension change which may be generated by application of an electrical field and at least one further piezoelectric-active...
02/26/2008
7332850Microfabricated ultrasonic transducers with curvature and method for making the same
The present invention provides a microfabricated ultrasonic transducers with curvature. The curvature is made possible by thinning the substrate such that it is flexible enough to be mounted on an assembly with the desired curvature. In one aspect of the invention, ...
02/19/2008
7288877Piezoelectric film device, and driving method of the same
A piezoelectric film device has a piezoelectric film element and a power supply circuit. The piezoelectric film element is formed of a first electrode, a second electrode, and a piezoelectric film that is sandwiched between the first electrode and second electrode a...
10/30/2007
7288876Non-symmetric drive type piezoelectric ceramic transformer
A non-symmetric drive type piezoelectric ceramic transformer has been disclosed in the present invention. The non-symmetric drive type piezoelectric ceramic transformer has a rectangular piezoelectric ceramic conductor. Along the length of rectangular piezoelectric ...
10/30/2007
7279822Transformer level driving circuit
A transformer level driving circuit mainly aims to drive a medium voltage system. It includes a control unit to generate a resonant frequency and output phase signal waveforms, and a medium voltage driving circuit which includes a floating level unit and a driving u...
10/09/2007
7274729Spread spectrum communication device and communication system
A structure of a spectrum spreading communication device which solves the problem with the conventional spectrum spreading communication using Barker codes, etc., and limits the rise of the side-lobe of a correctional signal independently of the order of information...
09/25/2007
7254876Method for manufacturing a piezoelectric resonator
A piezoelectric resonator is assembled so that a gap is formed between a resonator element and a plug using a connecting layer formed with a conductive resin, with flattened leads having leading end portions opening in a U-shape. This piezoelectric resonator permits...
08/14/2007
7256530Piezoelectric transformer drive circuit and cold cathode tube lighting apparatus
A piezoelectric transformer drive circuit of a full-bridge type having high efficiency minimizes the effect of voltage fluctuation of an input voltage VCC. The piezoelectric transformer drive circuit includes transistors that drive primary electrodes of a...
08/14/2007
7202592Piezoelectric transformer, power supply circuit and lighting unit using the same
A piezoelectric transformer includes a piezoelectric ceramic disc having one face and the other face opposite to each other in a thickness direction. A pair of low-impedance portions acting as one of a driving portion and a generator portion are disposed in the piez...
04/10/2007
7183698Piezoelectric structure
A piezoelectric structure receives input from a voltage source to generate polarization and output voltage. Two surfaces are formed on the direction normal to the polarized direction. One surface has an input electrode electrically connecting to the voltage source a...
02/27/2007
7161276Self-powered, electronic keyed, multifunction switching system
A self-powered switching system using electromechanical generators generates power for activation of a latching relay, switch, solenoid or latch pin. The electromechanical generators comprise electroactive elements that may be mechanically actuated to generate elect...
01/09/2007
7126251Interface acoustic wave device made of lithium tantalate
The invention relates to interfaces acoutics wave components made of lithium tantalate. Two substrate make up the filter have the same cut and the same crystal orientation, the invention gives the best cut angles in particular for optimizing the electromechanical co...
10/24/2006
7122939Piezoelectric power supply
A piezoelectric power supply has a piezoelectric transformer circuit configuration which is alterable flexibly according to varying loading power requirements. It includes a control unit (control IC), a power switch (MOSFET) and an inductor to drive a piezoelectric ...
10/17/2006
7105988Piezoelectric device and method to manufacture a piezoelectric device
A piezoelectric device is formed of a supporting substrate with first and second conductive traces on a first surface. A piezoelectric material layer is laminated to the supporting substrate with a first surface of the piezoelectric material layer electrically conne...
09/12/2006
7084583External electrode fluorescent lamp, back light unit using the external electrode fluorescent lamp, LCD back light equipment using the back light unit and driving device thereof
The present invention relates to an external electrode fluorescent lamp which can provide higher degree of and more improved uniformity of brightness than those of conventional ones, and to a LCD back light unit using the external electrode fluorescent lamp. The pre...
08/01/2006
7075217Laminated piezoelectric transformer
A laminated piezoelectric transformer is provided using the longitudinal vibration modes for step-up voltage conversion applications. The input portions are polarized to deform in a longitudinal plane and are bonded to an output portion. The deformation of the input...
07/11/2006
7065846Insulation for piezoceramic multilayer actuators
The invention relates to a method for the manufacture of piezoelectric multilayer actuator in which thin layers of a piezoceramic material, called “green leaves” on which at least one internal electrode is applied, are stacked to form a block such that the inter...
06/27/2006
7064442Integrated circuit package device
The invention relates to integrated circuit package devices including at least two component chips. In particular the invention describes such devices having a transformer provided between the two components chips, the transformer providing isolation between the com...
06/20/2006
7061166Laminated structure and method of manufacturing the same
A laminated structure in which interconnections can be easily formed for electrodes and in which the damage of an insulating layer attributed to stress is relieved. The laminated structure includes a laminated piece having a first electrode layer provided with a fir...
06/13/2006
7053534Piezoelectric vibration gyro-sensor
The present invention provides a piezoelectric vibration gyro-sensor utilizing Coriolis force that includes a tuning fork type vibrator in which two rectangular-columnar arms and a base to support the lower end of the arms are integrated; drive electrodes formed on ...
05/30/2006
7049760Camera flash circuit using a piezoelectric transformer to trigger firing of the camera flash tube
A camera flash circuit employing a piezoelectric transformer in the flash trigger circuit, the piezoelectric transformer having input terminals coupled to the main flash voltage storage capacitor and an output terminal coupled to the flash trigger terminal on the fl...
05/23/2006
7042167Back light device for liquid crystal displays
Disclosed herein is a back light device for LCDs. The back light device includes an inverter to supply an alternating current or a pulse, a plurality of fluorescent lamps to radiate visible light, a reflection member to reflect the light radiated from the fluorescen...
05/09/2006
7038354Driving circuit for piezoelectric transformer, cold-cathode tube light-emitting apparatus, liquid crystal panel and device with built-in liquid crystal panel
A driving circuit for a piezoelectric transformer is provided, which ensures lighting of all the cold-cathode tubes connected to the piezoelectric transformer, and reduces the difference in brightness between the cathode tubes during steady lighting, thereby enhanci...
05/02/2006
7034800Driving circuit and driving method for piezoelectric transformer, backlight apparatus, liquid crystal display apparatus, liquid crystal monitor, and liquid crystal TV
A driving circuit for a piezoelectric transformer is provided, which is capable of driving a piezoelectric transformer at a high efficiency and with low distortion, and being miniaturized. At the commencement of lighting a cold-cathode fluorescent tube, a digital co...
04/25/2006
7033127Powered, folding ramp for minivan
A drive mechanism under the floor of a minivan is coupled to the folding ramp by a rotating arm linkage, also located beneath the floor. The extension of the folding ramp is partially controlled by dynamic braking, i.e. using the electric motor as a generator and co...
04/25/2006
7030538Piezoelectric transformer, piezoelectric transformer unit, inverter circuit, light emission control device, and liquid crystal display device
A low loss, small scale piezoelectric transformer, suited for a cold cathode tube load, and having a high effective coupling factor, is provided using a piezoelectric plate having a single polarization direction. Controlling the dimensions of the third electrode por...
04/18/2006
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