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10 April 2008 Application of ionic polymer-metal composites for auto-focusing compact camera modules
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Step-motor, piezo, liquid lens and voice coil motor (VCM) have been thought as good candidates for actuators in auto-focusing compact camera module (CCM). Currently, VCMs take possession of big place in auto-focusing CCM market. However, VCMs have limitations in developing thin, low-power CCMs. Therefore, ionic polymer-metal composites (IPMCs) could be thought as one of the best candidates in developing auto-focusing CCM due to their well-known characteristics such as low-power consumption and large displacement. It is required that fast bending response (20 μm/20 ms) and large blocking force (800 mgf) should be achieved for the practical applications of IPMCs in developing auto-focusing CCM. Here, we present the method for increasing IPMC's bending response and displacement by anisotropic plasma treatment. Furthermore, we demonstrate the fabrication of a prototype of CCM actuated by IPMC and its remarkable low power consumption.
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Hyung-Kun Lee, Nak-Jin Choi, Sunkyung Jung, Sunyoung Lee, Hewon Jung, Jae Wook Ryu, and Kang-Ho Park "Application of ionic polymer-metal composites for auto-focusing compact camera modules", Proc. SPIE 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008, 69271N (10 April 2008);


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