Positioning device and positiioning method

Details Positioning device and positiioning method Positioning device and positiioning method

2008-02-28

2009-06-16

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C348S345000, C356S614000

Reexamination Certificate

active

07547867

ABSTRACT:
A positioning method for positioning a movable member so as to maximize a detection output of a position detecting means whose detection output varies corresponding to positions of the movable member, comprising: performing a wobbling control when the detection output is small, in which the movable member is moved forward and backward by a predetermined minute amount, and the movable member is moved in proportion to a difference between the detection output when the movable member is moved forward by the predetermined minute amount and the detection output when the movable member is moved backward; and performing a hill climbing control when the detection output is large, in which the movable member is moved in one direction by only a predetermined adjustment amount and when the detection output increases, the movable member is moved again in an identical direction by the adjustment amount.

REFERENCES:
patent: 2007/0273783 (2007-11-01), Okazaki et al.
patent: 2008/0165274 (2008-07-01), Toguchi
patent: 2003-338795 (2003-11-01), None

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