Lens driving mechanism, lens unit and image pickup device

Details Lens driving mechanism, lens unit and image pickup device Lens driving mechanism, lens unit and image pickup device

2006-03-21

2008-08-05

LeDynh, Bot (Department: 2862)

Photography

Camera shake sensing

Having stabilization system

C359S824000, C348S208400, C348S208500, C348S208700, C348S208990

Reexamination Certificate

active

07409150

ABSTRACT:
Disclosed herein is a lens driving mechanism which can achieve simplification of the mechanism and provision of appropriate control relating to a correction against a shake. The lens driving mechanism includes a piezoelectric element that is deformed when energized for applying driving force to the movable block and a charge amount sensor for detecting the amount of charge accumulated in the piezoelectric element. The amount of electric current to be supplied to the piezoelectric element is determined based on the external force, acting upon the movable block, which is estimated based on the difference between the amount of charge injected into or discharged from the piezoelectric element and the amount of charge accumulated in the piezoelectric element and detected by the charge amount sensor when the movable block is moved in the direction perpendicular to the optical axis.

REFERENCES:
patent: 6940542 (2005-09-01), Kitazawa et al.
patent: 2000-066257 (2000-03-01), None

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