Lens driving device, camera module, and camera mounting device
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United States of America Patent
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Mar 13, 2018
Issued Date -
N/A
app pub date -
Jun 18, 2015
filing date -
Jul 11, 2014
priority date (Note) -
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Abstract
Provided is a technology which: has a structure that is advantageous for size reduction and power saving; and, moreover, is useful when automatic focusing using a closed-loop control system. A lens driving device comprising: an autofocus driving unit; a Hall element which separates an autofocus magnet section in the optical axis direction and is disposed in a position corresponding to one opposing corner section of the autofocus magnet section and in a manner such that the detection direction matches the optical axis direction; a first position detection magnet which is disposed near the Hall element and in a manner such that the magnetisation direction matches the optical axis direction; and a second position detection magnet which has the same configuration as the first position detection magnet and is disposed in a point symmetrical position relating to the first position detection magnet and the optical axis direction.
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