Capacitive sensor
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United States of America Patent
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Jun 30, 2009
Grant Date -
Nov 29, 2007
app pub date -
Mar 22, 2007
filing date -
Mar 28, 2006
priority date (Note) -
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Abstract
A capacitive sensor includes an error compensating unit that, in an arrangement that a part of a fixed electrode as an edge portion and a part of a movable electrode as an edge portion are opposed to each other keeping a gap in a direction of shift of a detecting unit, reduces a detection error of capacitance due to the shift of comb-tooth portions from each other in the detecting unit, by a change of capacitance according to variation of the gap caused by the shift.
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