Invention Grant
- Patent Title: Apparatus for controlling position of voice coil motor using voltage/frequency conversion techniques
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Application No.: US16144070Application Date: 2018-09-27
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Publication No.: US10554163B2Publication Date: 2020-02-04
- Inventor: Jung Eui Park , Woo Young Choi , Joo Hyoung Lee , Joo Yul Ko
- Applicant: Samsung Electro-Mechanics Co., Ltd.
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electro-Mechanics Co., Ltd.
- Current Assignee: Samsung Electro-Mechanics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: NSIP Law
- Priority: KR10-2017-0144745 20171101; KR10-2018-0039058 20180404
- Main IPC: H02K41/00
- IPC: H02K41/00 ; H02P25/034 ; G02B7/04

Abstract:
An apparatus for controlling a position of a voice coil motor (VCM) includes a coil disposed to face a magnetic member provided on one surface of a lens carrier; a driving circuit applying a superimposed current, including a driving current and a position detecting current, to the coil; a filter circuit extracting an alternating current (AC) voltage from a voltage across the coil; a voltage/frequency conversion circuit converting the AC voltage extracted by the filter circuit into a frequency signal; and a digital control circuit detecting positional information of the VCM based on a frequency component of the frequency signal.
Public/Granted literature
- US20190131906A1 APPARATUS FOR CONTROLLING POSITION OF VOICE COIL MOTOR USING VOLTAGE/FREQUENCY CONVERSION TECHNIQUES Public/Granted day:2019-05-02
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