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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Kawasaki; Osamu
Address:
Tsuzuki-gun, JP
No. of patents:
8
Patents:












Patent Number Title Of Patent Date Issued
6243933 Piezoelectric resonator and method for fabricating the same June 12, 2001
A wafer with a reversed domain is prepared for two piezoelectric single crystal plates and of about the same thickness by using direct bonding without any adhesive. Driving electrodes are formed on two principal planes of the wafer with a reversed domain to provide a piezoelectric re
6150903 Piezoelectric filter, its manufacturing method, and intermediate frequency filter November 21, 2000
A piezoelectric filter is one not changing in the holding position a resonator in spite of impulse, small in the number of parts, easy to assemble from one direction, small, thin, and stable in characteristic. For example, as shown in FIG. 7, on electrode patterns on a package 10 for
6069359 Pyroelectric IR sensor May 30, 2000
A pyroelectric IR sensor equipped with a chopper for opening and closing a shielding plate so that infrared rays emitted from an object are allowed to be incident onto a pyroelectric sensor unit and intercepted therefrom, and having a structure capable of providing a large shielding widt
6028398 Cold cathode fluorescent lamp driving apparatus using a piezoelectric transformer February 22, 2000
An AC driving signal of a frequency in the vicinity of the resonance frequency of a piezoelectric transformer is generated by a variable oscillation circuit and the waveform of the output signal of the variable oscillation circuit is shaped so as to be substantially sinusoidal by a w
5929555 Piezoelectric resonator and method for fabricating the same July 27, 1999
A wafer with a reversed domain is prepared for two piezoelectric single crystal plates 11 and 12 having about the same thickness as each other by using direct bonding without any adhesive. Then, driving electrodes 13 are formed on two principal planes of the wafer with a reversed domain
5796213 Inverter power source apparatus using a piezoelectric transformer August 18, 1998
An inverter power source apparatus using a piezoelectric transformer, has: variable oscillating device for oscillating a pulse signal; pulse-width changing device for changing a width of said pulse signal of said variable oscillating device; driving device for generating a driving signal
5739532 Pyroelectric IR sensor April 14, 1998
A pyroelectric IR sensor equipped with a chopper for opening and closing a shielding plate so that infrared rays emitted from an object are allowed to be incident onto a pyroelectric sensor unit and intercepted therefrom, and having a structure capable of providing a large shielding widt
5521457 Holding structure for a piezoelectric vibrator May 28, 1996
Protrusions made of an electrically conductive material such as a metal or ceramic are formed around a node point or a node line of vibrations of a piezoelectric plate on two principal planes thereof by a spraying process. The piezoelectric plate is held at the protrusions with leaf spri










 
 
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