Optical image stabilization comprising shape memory alloy actuators
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United States of America Patent
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Sep 30, 2014
Grant Date -
Oct 13, 2011
app pub date -
Sep 11, 2009
filing date -
Sep 12, 2008
priority date (Note) -
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Abstract
A camera apparatus capable of providing optical image stabilization comprises: a support structure; a camera unit comprising an image sensor and a lens system; a suspension system comprising a plurality of flexure elements supporting the camera unit on the support structure in a manner allowing the camera unit to tilt; and a plurality of SMA actuators each formed as SMA wire connected between the camera unit and the support structure and arranged on contraction to drive tilting of the camera unit. The SMA wire may be fixed to the camera unit at its ends and hooked over an element of the support structure. A vibration sensor, whose output is used as the basis for generating drive signals, may be mounted on the camera unit.
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