Lens driving device

Details Lens driving device Lens driving device

2005-02-08

2005-02-08

Dang, Hung Xuan (Department: 2873)

Optical: systems and elements

Lens

With support

C359S696000, C359S823000

Reexamination Certificate

active

06853507

ABSTRACT:
The present invention relates to a lens driving device, more particularly, capable of adjusting an effective focal length determined by the relative distance of lenses in an optical device having a zooming function. In the lens driving device, a barrel unit has an internal space for containing a lens therein and a guide slot for allowing forward and backward movement of the lens through rotation of the barrel unit. A ring-shaped piezoelectric actuator unit is arranged adjacent to the barrel unit for being contracted or expanded radially in response to an external input signal. A drive member is mounted on the piezoelectric actuator unit and having a plurality of segments projected toward the barrel unit to contact the same.

REFERENCES:
patent: 6078438 (2000-06-01), Shibata et al.
patent: 6215605 (2001-04-01), Kuwana et al.
patent: 6268970 (2001-07-01), Ito et al.

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