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US 9,807,515 B2Granted
Piezoelectric speaker device
AssigneeMurata Manufacturing Co., Ltd.
InventorMasamichi Ando
Life of this patent
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Abstract
A piezoelectric speaker device that includes an organic polymer piezoelectric film, at least one pair of electrodes provided in contact with the piezoelectric film and the at least one pair of electrodes including a user-side electrode on a first side of the piezoelectric film, an insulation layer on the user-side electrode, a flaw detection electrode line on the insulation layer, and a detection circuit configured to detect whether the flaw detection electrode line is in a normal electric conduction state.
Claims17
A piezoelectric device comprising:
- an organic polymer piezoelectric film;
- at least one pair of electrodes provided in contact with the piezoelectric film and the at least one pair of electrodes including a user-side electrode on a first side of the piezoelectric film;
- an insulation layer on the user-side electrode;
- a flaw detection electrode line on the insulation layer;
- and
- a detection circuit configured to detect whether the flaw detection electrode line is in a normal electric conduction state.
3 more elements
Dependencies are inferred from the claim text.