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A Compact Low-Cost Camera Module with Modified Magnetic Restoring Force

Published online by Cambridge University Press:  12 January 2017

C. S. Liu ,
B. J. Tsai  and
Y. H. Chang
C. S. Liu*
Affiliation:
Department of Mechanical EngineeringGraduate Institute of Opto-MechatronicsAdvanced Institute of Manufacturing with High-tech InnovationsNational Chung Cheng UniversityChiayi, Taiwan
B. J. Tsai
Affiliation:
Department of Mechanical EngineeringAdvanced Institute of Manufacturing with High-tech InnovationsNational Chung Cheng UniversityChiayi, Taiwan
Y. H. Chang
Affiliation:
Department of Mechanical EngineeringAdvanced Institute of Manufacturing with High-tech InnovationsNational Chung Cheng UniversityChiayi, Taiwan
*
*Corresponding author ([email protected])
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Abstract

In recent years, compact camera modules (CCMs) have been widely used in consumer electrical and electronic products. CCMs with low cost specially are necessary for portable devices. Therefore, the present group recently developed a miniaturized open-loop controlled camera module with low cost for cellphone applications, in which the Lorentz force is balanced by a magnetic restoring force. To enhance the performance of the camera module, this article reports a pattern structure to modify the linearity of the magnetic restoring force. We fabricated a CCM prototype with the dimensions of 8.5 mm × 8.5 mm × 5 mm and demonstrated the usefulness of the pattern structure with the CCM prototype. Its potential applications are foreseeable in portable devices, such as cellphones, web cameras, personal digital assistants and other commercial electronics.

Keywords

CameraCompact camera module (CCM)Magnetic restoring forceVoice coil actuator (VCA)Autofocusing
Type
Research Article
Information
Journal of Mechanics , Volume 33 , Issue 4 , August 2017 , pp. 475 - 482
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2016 

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