Voice coil motor with surface coil

Details Voice coil motor with surface coil Voice coil motor with surface coil

2011-04-26

2011-04-26

Le, Dang D (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Linear

Reexamination Certificate

active

07932645

ABSTRACT:
A voice coil motor with a surface coil includes a set of magnetic sensing elements, a lens carrier physically connected to the set of magnetic sensing elements, a pedestal, and a set of printed circuit boards fixed onto the pedestal. A patterned metal layer is fabricated on the set of printed circuit boards to form the surface coil, a Hall sensor is installed on one of the printed circuit boards and transmits signals (e.g., operation voltages and feedback sensing signals) via traces fabricated on the set of printed circuit boards, so as to achieve simultaneous fabrication of the surface coil and traces, thereby saving space which is conventionally occupied by copper coils. The Hall sensor can sense a variation in a magnetic field resulting from the motion of the set of magnetic sensing elements to determine a motion status of the lens carrier.

REFERENCES:
patent: 6608411 (2003-08-01), Horng et al.
patent: 7309932 (2007-12-01), Tseng
patent: 7400068 (2008-07-01), Tseng
patent: 7405892 (2008-07-01), Wu et al.
patent: 7679225 (2010-03-01), Liu et al.
patent: 2006/0055252 (2006-03-01), Tseng
patent: 2006/0214520 (2006-09-01), Tseng

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