Invention Grant
- Patent Title: VCM control circuit
- Patent Title (中): VCM控制电路
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Application No.: US12254641Application Date: 2008-10-20
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Publication No.: US08222841B2Publication Date: 2012-07-17
- Inventor: Tarek Lule
- Applicant: Tarek Lule
- Applicant Address: FR Grenoble
- Assignee: STMicroelectronics (Grenoble) SAS
- Current Assignee: STMicroelectronics (Grenoble) SAS
- Current Assignee Address: FR Grenoble
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: FR0758472 20071022
- Main IPC: H02P1/00
- IPC: H02P1/00

Abstract:
A method of controlling a moving part of a voice coil motor to move from an first position to a second position, wherein the position of the moving part is controlled by the level of an electrical signal applied to a coil of the voice coil motor, a first level of the electrical signal corresponding to the first position, and a second level of the electrical signal corresponding to the second position, the method including: at a first time, changing the electrical signal from the first level to an intermediate level, the intermediate level being chosen such that a peak overshoot of the moving part corresponds to the second position; and at a second time calculated to correspond to a delay of half an oscillation period of the moving part after the first time, changing the electrical signal to the second level.
Public/Granted literature
- US20090102403A1 VCM CONTROL CIRCUIT Public/Granted day:2009-04-23
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