Design of an auto-focusing actuator with a flexure-based compliant mechanism for mobile imaging devices

Choong Kim, Myeong Gyu Song, Youngjun Kim, No Cheol Park, Kyoung Su Park, Young Pil Park, Kyung Sik Shin, Jeen Gi Kim, Geum Sik Lee

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


There is increasing consumer's demand for high-quality and high-performance mobile imaging devices. In this paper, an auto-focusing (AF) actuator with a flexure hinge that uses the electromagnetic (EM) circuit of a voice coil motor was designed and evaluated. The flexure hinge was designed by using finite element analysis. The EM circuit was designed based on the structural stiffness of the device. The EM circuit was analyzed using the design of experiments procedure. Based on the results, the effective design parameters were selected, and improvements were made to the design. Finally, a prototype of the AF actuator was manufactured, and the feasibility and performance of the actuator with the flexure hinge were verified experimentally. The experimental results indicated that the proposed actuator performed adequately and satisfied the design requirements.

Original languageEnglish
Pages (from-to)1633-1644
Number of pages12
JournalMicrosystem Technologies
Issue number9-10
Publication statusPublished - 2013 Sept

Bibliographical note

Funding Information:
The support of the MuTas Co., Ltd. is gratefully acknowledged. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government(MEST) (No. 2012-0001013).

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering


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