Experimental Characterization of High-Performance Miniature Auto-Focusing VCM Actuator

Author

Liu, Chien-Sheng ; Ko, Shun-Sheng ; Lin, Psang-Dain

Author_Institution

Dept. of Mech. Eng., Nat. Central Univ., Taoyuan, Taiwan

Volume

47

Issue

4

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

738

Lastpage

745

Abstract

When designing an auto-focusing actuator for use in cell phone cameras, it is important to maximize the positioning repeatability while simultaneously minimizing the device size, the power consumption, the response time, and the dynamic tilt angle. In a previous study (Liu and Lin, Opt. Express, vol. 17, pp. 9754-9763, 2009), the current group designed a miniature auto-focusing voice coil motor (VCM) actuator in which the lens was held in position using a magnetoconductive plate and a closed-loop control mechanism. The aim of this study is to characterize the performance of this device using an experimental approach. The results show that the proposed actuator has a high positioning repeatability, a low dynamic tilt angle, a rapid response, and a low power consumption.

Keywords

cameras; closed loop systems; coils; electric actuators; linear motors; optical variables control; position control; self-focusing; small electric machines; cell phone camera; closed-loop control mechanism; dynamic tilt angle; lens; magnetoconductive plate; miniature auto-focusing voice coil motor actuator; positioning repeatability; power consumption; response time; Actuators; cameras; linear motors; self-focusing; simulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2103084

Filename

5677472