Use of a piezo-active device and an appliance and a system including it
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United States of America Patent
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Aug 30, 2005
Grant Date -
Jan 23, 2003
app pub date -
Jun 14, 2002
filing date -
Jun 15, 2001
priority date (Note) -
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Abstract
A piezo-active device includes a piezo-electric element and an elastically deformable shell in which the piezo-electric element is disposed. The use of this piezo-active device includes, for supplying power to an electrical circuit connected to the piezo-electric element, the step of exerting on the piezo-active device a punctual mechanical action and then allowing the piezo-active device to resonate freely. An appliance includes this kind of piezo-active device, en electrical circuit connected to the piezo-electric element, and means for exerting the punctual mechanical action. A system includes this kind of appliance whose electrical circuit can emit electromagnetic waves and a second appliance adapted to receive waves emitted by the first appliance. Applications include controlling a spotlight.
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