Driver for piezoelectric motors
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 8, 2004
Grant Date -
N/A
app pub date -
Apr 24, 2001
filing date -
Oct 25, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A micromotor comprising: a piezoelectric element including a common electrode and a plurality of other electrodes formed thereon and including at least a first a and a second electrode group, each group including at least one electrode, wherein the piezoelectric element causes motion in a first direction when a voltage is applied between the first electrode group and the common electrode, and wherein the piezoelectric element causes motion in a second direction when a voltage is applied between the second electrode group and the common electrode; a voltage source that electrifies the common electrode; and at least two switches separately connected between the first and second electrode groups and a low voltage, said switches being activatable to connect one of said first and second electrode groups to the low voltage to cause selective motion in the first or second directions.
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