Design and characterization of miniature auto-focusing voice coil motor actuator for cell phone camera applications

Chien Sheng Liu, Psang Dain Lin, Po Heng Lin, Shun Sheng Ke, Yu Hsiu Chang, Ji Bin Horng

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)

Abstract

When designing an auto-focusing actuator for use in cell phone cameras, it is essential to minimize the device size, maximize the positioning repeatability, and minimize the power consumption. In a previous study, we presented a miniature auto-focusing voice coil motor (VCM) actuator for cell phone camera applications in which the lens was precisely positioned by a closed-loop feedback signal generated by a Hall element. Our study characterizes the performance of this device by using an experimental approach. The results show that the proposed actuator is not only smaller than a conventional VCM actuator with an open-loop positioning system, but also has improved positioning repeatability, a more rapid response, and lower power consumption.

Original languageEnglish
Article number4773532
Pages (from-to)155-159
Number of pages5
JournalIEEE Transactions on Magnetics
Volume45
Issue number1
DOIs
Publication statusPublished - 2009 Jan

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Design and characterization of miniature auto-focusing voice coil motor actuator for cell phone camera applications'. Together they form a unique fingerprint.

Cite this