Piezoelectric transformer, power supply circuit and lighting...

Details Piezoelectric transformer, power supply circuit and lighting... Piezoelectric transformer, power supply circuit and lighting...

2007-04-10

2007-04-10

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S369000, C310S316010

Reexamination Certificate

active

10843015

ABSTRACT:
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 piezoelectric ceramic disc symmetrically with respect to a central axis of the piezoelectric ceramic disc, while a pair of high-impedance portions acting as the other of the driving portion and the generator portion are disposed in the piezoelectric ceramic disc symmetrically with respect to the central axis so as to be electrically separated from the low-impedance portions such that the piezoelectric transformer is driven in a radial extensional vibration mode of the piezoelectric ceramic disc.

REFERENCES:
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patent: 5814922 (1998-09-01), Uchino et al.
patent: 5998937 (1999-12-01), Nishigaki
patent: 6333598 (2001-12-01), Hsu et al.
patent: 7075217 (2006-07-01), Vazquez Carazo
patent: 4-167504 (1992-06-01), None
patent: 11-317553 (1999-11-01), None
patent: 2001-298221 (2001-10-01), None

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