Invention Grant
- Patent Title: Lens driving apparatus and lens driving method
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Application No.: US15411688Application Date: 2017-01-20
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Publication No.: US10721387B2Publication Date: 2020-07-21
- Inventor: Naoaki Tani
- Applicant: OLYMPUS CORPORATION
- Applicant Address: JP Tokyo
- Assignee: Olympus Corporation
- Current Assignee: Olympus Corporation
- Current Assignee Address: JP Tokyo
- Agency: Pokotylo Patent Services
- Agent John C. Pokotylo
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@692e8ef
- Main IPC: H04N5/232
- IPC: H04N5/232 ; G02B7/08 ; G02B7/09 ; G02B7/36

Abstract:
A lens driving apparatus comprising: a stepping motor for driving a lens; a rotation detection sensor for detecting a rotation position of the stepping motor; and a controller which is capable of switching between open-loop control that performs position instruction in accordance with a predetermined pattern and closed-loop control that performs position instruction on the basis of follow-up delay, changes and accelerates the velocity for advancing the position of the stepping motor on the basis of a fixed velocity pattern by open-loop control when the lens starts moving, and transitions to the closed-loop control upon the velocity corresponding to the velocity pattern reaching a predetermined value.
Public/Granted literature
- US20170223257A1 LENS DRIVING APPARATUS AND LENS DRIVING METHOD Public/Granted day:2017-08-03
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