Photography – With exposure objective focusing means – focusing aid – or... – Lens drive circuit or motor structure
Reexamination Certificate
2008-06-17
2010-11-09
Koval, Melissa J (Department: 2862)
Photography
With exposure objective focusing means, focusing aid, or...
Lens drive circuit or motor structure
C348S357000
Reexamination Certificate
active
07831140
ABSTRACT:
There is provided an apparatus for auto-focusing including: a sensing unit sensing a current position of a lens moving within a predetermined range along a moving shaft; an A/D converter converting a lens position value from the sensing unit into a digital signal; a lens position control unit generating a signal for moving the lens to a target lens position determined by an auto-focusing algorithm; a driving signal generating unit generating a square wave signal according to the signal from the lens position control unit; and an operation unit connected to the A/D converter and controlling a time at which the A/D converter performs conversion according to the square wave signal from the driving signal generating unit.
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Japanese Patent Office Action issued Jul. 21, 2009.
Kwon Kyoung Soo
Park Chan Woo
Koval Melissa J
Lowe Hauptman & Ham & Berner, LLP
Parker Autumn
Samsung Electro-Mechanics Co. Ltd.
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