Voice coil driving auto-focus lens module

Details Voice coil driving auto-focus lens module Voice coil driving auto-focus lens module

2009-04-13

2009-11-03

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With support

C359S819000

Reexamination Certificate

active

07612957

ABSTRACT:
A voice coil driving auto-focus lens module is disclosed. The voice coil driving auto-focus lens module includes a base, two conductive plates, an insulation spacer, four permanent magnets, a lens holder, an optical lens, a spring set, a coil, and a top cover. The lens holder, the optical lens and the coil form a lens set that moves synchronously while the permanent magnets are fixed on an outer circle of a leaf spring. The spring set includes a coil spring and a leaf spring. By resultant spring force due to extension or compression of the coil spring as well as the leaf spring, together with the electromagnetic force, the lens module moves fast, focuses stably and the tilt of the lens module is reduced.

REFERENCES:
patent: 7499231 (2009-03-01), Shyu et al.
patent: 63247924 (1988-10-01), None
patent: 3124292 (2006-08-01), None
patent: 3132575 (2007-06-01), None
patent: M317027 (2007-08-01), None
patent: M318736 (2007-09-01), None
patent: M331687 (2008-05-01), None

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