Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-25T20:14:39.050Z Has data issue: false hasContentIssue false
  • English
  • Français

New Electromagnetic Design of Miniature AF VCM Actuator with Low Cost

Published online by Cambridge University Press:  20 November 2015

C.-S. Liu ,
L. Kuo  and
B.-J. Tsai
C.-S. Liu*
Affiliation:
Department of Mechanical EngineeringAdvanced Institute of Manufacturing with High-tech InnovationsNational Chung Cheng UniversityChiayi, Taiwan
L. Kuo
Affiliation:
Opto-Electronic Actuator Module Business DivisionWah Hong Industrial Corp.Tainan, Taiwan
B.-J. Tsai
Affiliation:
Department of Mechanical EngineeringAdvanced Institute of Manufacturing with High-tech InnovationsNational Chung Cheng UniversityChiayi, Taiwan
*
*Corresponding author ([email protected])
Get access

Abstract

Recently, compact and high-resolution camera modules with auto-focusing (AF) function have been integrated into cell phones in order to capture sharp photographs. Consumer demands AF camera modules in cell phones to have high performance with low cost. Accordingly, the present study proposes a new electromagnetic design of miniature AF voice coil motor (VCM) actuator with closed-loop control for cell phone camera modules to satisfy the requirements. The structure of the proposed AF VCM actuators was designed by using simulation methods. The performance of the proposed AF VCM actuators was demonstrated by a laboratory-built prototype. The experimental results have shown that the proposed AF VCM actuator has excellent performance with lower power consumption, higher positioning repeatability, and lower cost, when compared to previous AF VCM actuators with open-loop control or closed-loop control.

Keywords

Voice coil motorActuatorAuto-focusingSelf-focusing
Type
Research Article
Information
Journal of Mechanics , Volume 32 , Issue 4 , August 2016 , pp. 421 - 426
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2016 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Kim, K. H., Lee, S. Y. and Kim, S., “A Mobile Auto-Focus Actuator Based on a Rotary VCM with the Zero Holding Current,” Optics Express, 17, pp. 5891–5896 (2009).CrossRefGoogle ScholarPubMed
2. Choi, J. S., Yoo, J. and Park, N. C., “Small form Factor Actuator Design for Camera Phone Lens Systems,” Microsystem Technologies, 15, pp. 1489–1497 (2009).CrossRefGoogle Scholar
3. Zhou, T. Y., et al., “A Nut-Type Ultrasonic Motor and Its Application in the Focus System,” Chinese Science Bulletin, 54, pp. 3778–3783 (2009).CrossRefGoogle Scholar
4. Song, B. Y., et al., “Auto-Focusing Actuator and Camera Module Including Flexible Diaphragm for Mobile Phone Camera and Wireless Capsule Endoscope,” Microsystem Technologies, 16, pp. 149–159 (2010).CrossRefGoogle Scholar
5. Lai, L. K., Tsai, C. L. and Liu, T. S., “Design of Compact Linear Electromagnetic Actuator for Auto-Focusing in Phone Camera,” IEEE Transactions on Magnetics, 47, pp. 4740–4744 (2011).CrossRefGoogle Scholar
6. Liu, C. S. and Lin, P. D., “Miniaturized Auto-Focusing VCM Actuator with Zero Holding Current,” Optics Express, 17, pp. 9754–9763 (2009).CrossRefGoogle ScholarPubMed
7. Liu, C. S., Ko, S. S. and Lin, P. D., “Experimental Characterization of High-Performance Miniature Auto-Focusing VCM Actuator,” IEEE Transactions on Magnetics, 47, pp. 738–745 (2011).CrossRefGoogle Scholar
8. Ko, H. P., Jeong, H. and Koc, B., “Piezoelectric Actuator for Mobile Auto Focus Camera Applications,” Journal of Electroceramics, 23, pp. 530–535 (2009).CrossRefGoogle Scholar
9. Cao, W. Z., Yang, X. H. and Tian, X. B., “Numerical Evaluation of Size Effect in Piezoelectric Micro-Beam with Linear Micromorphic Electroelastic Theory,” Journal of Mechanics, 30, pp. 467–476 (2014).CrossRefGoogle Scholar
10. Duocastella, M. and Arnold, C. B., “Transient Response in Ultra-High Speed Liquid Lenses,” Journal of Physics D: Applied Physics, 46, p. 075102 (2013).CrossRefGoogle Scholar
11. Zeng, X. and Jiang, H., “Liquid Tunable Microlenses Based on MEMS Techniques,” Journal of Physics D: Applied Physics, 46, p. 323001 (2013).CrossRefGoogle ScholarPubMed
12. Xu, S., Ren, H. and Wu, S. T., “Dielectrophoretically Tunable Optofluidic Devices,” Journal of Physics D: Applied Physics, 46, p. 483001 (2013).CrossRefGoogle Scholar
13. Zhang, H., Ren, H., Xu, S. and Wu, S. T., “Temperature Effects on Dielectric Liquid Lenses,” Optics Express, 22, pp. 1930–1939 (2014).CrossRefGoogle ScholarPubMed
14. Lin, H. C. and Lin, Y. H., “An Electrically Tunable-Focusing Liquid Crystal Lens with a Low Voltage and Simple Electrodes,” Optics Express, 20, pp. 2045–2052 (2012).CrossRefGoogle ScholarPubMed
15. Lin, Y. H. and Chen, H. S., “Electrically Tunable-Focusing and Polarizer-Free Liquid Crystal Lenses for Ophthalmic Applications,” Optics Express, 21, pp. 9428–9436 (2013).CrossRefGoogle ScholarPubMed
16. Chen, M. S., Chen, P. J., Chen, M. and Lin, Y. H., “An Electrically Tunable Imaging System with Separable Focus and Zoom Functions Using Composite Liquid Crystal Lenses,” Optics Express, 22, pp. 11427–11435 (2014).CrossRefGoogle ScholarPubMed
17. Shian, S., Diebold, R. M. and Clarke, D. R., “Tunable Lenses Using Transparent Dielectric Elastomer Actuators,” Optics Express, 21, pp. 8669–8676 (2013).CrossRefGoogle ScholarPubMed
18. Diaz-Calleja, R., et al, “Theoretical Modelling and Experimental Results of Electromechanical Actuation of an Elastomer,” Journal of Physics D: Applied Physics, 46, p. 235305 (2013).CrossRefGoogle Scholar
19. Manabu, S. and Morimasa, Y., “Lens Drive Device,”r PAJ 2002-365514 (2002).Google Scholar
20. Liu, C. S. and Lin, P. D., “A Miniaturized Low-Power VCM Actuator for Auto-Focusing Applications,” Optics Express, 16, pp. 2533–2540 (2008).CrossRefGoogle ScholarPubMed
21. Product Information, New Shicoh Technology Co. Ltd, http://new-shicoh.eom/publics/index/8/ (2015).Google Scholar