Lens actuating device
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United States of America Patent
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-
Nov 4, 2008
Grant Date -
May 8, 2008
app pub date -
Dec 21, 2006
filing date -
Apr 18, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lens actuating device is applicable in a lens module. The lens module has at least a housing and a lens support in the space formed by the housing. The lens actuating device has at least a base disposed in the housing, a piezoelectric element disposed on the base for generating kinetic energy, a clamping component disposed on the piezoelectric element and a linkage element coupled to the lens support and clamped in the clamping component. The clamping component makes a corresponding motion upon receiving a kinetic energy created by the piezoelectric element, which allows a stick-slip friction to be generated in the clamping component to actuate the lens, thereby achieving optical zooming or focusing and avoiding the shortcomings of the prior art using for example a voice coil motor or a stepping motor.
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