公开(公告)号：US10608563B2

公开(公告)日：2020-03-31

申请号：US15306361

申请日：2016-06-30

申请人： DONGWOON ANATECH CO., LTD.

发明人： Seung Kwon Lee ,  Sun Pyo Lee ,  Ho Jun Lee ,  Sin Won Cho

IPC分类号： H02P25/02 ,  H02K33/18 ,  H02K1/34 ,  H02P7/025 ,  G02B7/04 ,  G03B13/34 ,  H02K41/035

摘要： The present invention relates to a driving control of a voice coil motor (hereinafter, referred to as ‘VCM’) which moves lens of a camera module, more particularly to a driving control method for VCM capable of reducing the noise generated at the time of initial driving or landing of the lens and reducing the moving time thereof, and the method is characterized by and include the steps of: applying a linearly increasing current with a first slope to the VCM up to a pre-set first inflection point in response to a camera operation-on command; and moving the lens to an infinite position by applying a linearly increasing current with a second slope less steep than the first slope to the VCM from the first inflection point to the infinite position.