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Journal Article
Electroactive Polymer Actuator for Lens-Drive Unit in Auto-Focus Compact Camera Module
- Authors
- Hyung Kun Lee, Nak Jin Choi, Sunk Yung Jung, Kang Ho Park, He Won Jung, Jae Kyu Shim, Jae Wook Ryu, Jong Dae Kim
- Issue Date
- 2009-12
- Citation
- ETRI Journal, v.31, no.6, pp.695-702
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Abstract
- We propose a lens-drive unit composed of an ionic polymer-metal composite (IPMC) for an auto-focus compact camera module in cellular phones to solve the power consumption problem of voice coil motors which are widely used in commercial products. In this research, an IPMC incorporated into a lens-drive unit is designed to implement a large displacement in low-power consumption by using an anisotropic plasma treatment. Experimental results show that a camera module containing IPMCs can control and maintain the position of the lens by using proportional integral derivative control with a photo-reflective position sensor despite the non-linear actuation behavior of IPMCs. We demonstrate that the fabrication and commercialization of a lens actuator that has a large displacement and low power consumption using IPMCs is possible in the near future. Copyright © 2009 ETRI.
- KSP Keywords
- Actuation behavior, Auto-focus, Commercial products, Compact camera module, Drive unit, Electro active polymer(EAP), Ionic polymer-metal composites, Large Displacement, Lens actuator, Proportional Integral Derivative Control, Voice coil