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Title: Design of a Slim Optical Image Stabilization Actuator for Mobile Phone Cameras
Authors: Hsing-Cheng Yu;T. S. Liu
Contributors: NTOU:Department of Systems Engineering and Naval Architecture
Keywords: 72.15.Gd;75.80.+q
Date: 2007-12
Issue Date: 2012-06-15T07:34:33Z
Publisher: physica status solidi (c)
Abstract: abstract:Mechanical optical image stabilization actuator (OISA) will quickly become a standard feature in a high resolution mobile phone camera (MPC) and the quantity of MPC will exceed that of digital still cameras in several years. Whenever jitter arises from shaky hands or environment in taking photos, optical images projected upon an image sensor blur. Designing a slim OISA in MPC is an effective solution that addresses image quality. Therefore, this work presents a slim OISA utilized in MPC to compensate jitter form camera shake in taking photos. Two proportional-integral-derivative controllers based on transfer functions for dual axes of the slim OISA system in MPC obtained from system identification have been designed. The settling time of dual axes are less than 0.03 sec. Furthermore, a thrust ball bearing in this study has reduced the friction force between the movable and the stationary parts, so as to minimize the driving current to be less than 5 mA. Hence, the slim OISA has satisfied low power consumption requirement, and is also possible to reduce dimension in the MPC application.
Relation: 4(12), pp.4647–4650
Appears in Collections:[Department of Systems Engineering and Naval Architecture] Periodical Articles

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