Invention Grant
- Patent Title: Driving control device for voice coil motor and method of using the same
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Application No.: US15306361Application Date: 2016-06-30
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Publication No.: US10608563B2Publication Date: 2020-03-31
- Inventor: Seung Kwon Lee , Sun Pyo Lee , Ho Jun Lee , Sin Won Cho
- Applicant: DONGWOON ANATECH CO., LTD.
- Applicant Address: KR Seoul
- Assignee: DONGWOON ANATECH CO., LTD.
- Current Assignee: DONGWOON ANATECH CO., LTD.
- Current Assignee Address: KR Seoul
- Agency: Stein IP, LLC
- International Application: PCT/KR2016/007074 WO 20160630
- International Announcement: WO2018/004037 WO 20180104
- Main IPC: H02P25/02
- IPC: H02P25/02 ; H02K33/18 ; H02K1/34 ; H02P7/025 ; G02B7/04 ; G03B13/34 ; H02K41/035

Abstract:
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.
Public/Granted literature
- US20180205333A1 DRIVING CONTROL DEVICE FOR VOICE COIL MOTOR AND METHOD OF USING THE SAME Public/Granted day:2018-07-19
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