Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-25T05:58:40.417Z Has data issue: false hasContentIssue false
  • English
  • Français

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])
Get access

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 

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. Wang, J. L., Chen, T. Y., Chien, Y. H. and Su, G. D. J., Miniature optical autofocus camera by micromachined fluoropolymer deformable mirror,” Optics Express, 17, pp. 6268–6274 (2009).Google Scholar
2. Tsai, F. S., Cho, S. H., Lo, Y. H., Vasko, B. and Vasko, J., Miniaturized universal imaging device using fluidic lens,” Optics Letters, 33, pp. 291–293 (2008).Google Scholar
3. Yoon, H. S. and Park, T. H., A fast focusing method for CCM autofocusing handlers,” International Journal of Advanced Manufacturing Technology, 43, pp. 287–293 (2009).Google Scholar
4. Liu, C. S. and Lin, P. D., Miniaturized auto-focusing VCM actuator with zero holding current,” Optics Express, 17, pp. 9754–9763 (2009).Google Scholar
5. Cheng, H. C., Xu, F., Liu, Y. F., Levi, S. and Wu, S. T., Adaptive mechanical-wetting lens actuated by ferrofluids,” Optics Communications, 284, pp. 2118–2121 (2011).Google Scholar
6. 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).Google Scholar
7. Abdullah, S. J., Ratnam, M. M. and Samad, Z., Error-based autofocus system using image feedback in a liquid-filled diaphragm lens,” Optical Engineering, 48, 123602 (2009).Google Scholar
8. Yu, H. C. et al., Low power consumption focusing actuator for a mini video camera,” Journal of Applied Physics, 99, 08R901 (2006).Google Scholar
9. Yu, H. C., Chen, T. C. and Liu, C. S., Adaptive fuzzy logic proportional-integral-derivative control for a miniature autofocus voice coil motor actuator with retaining force,” IEEE Transactions on Magnetics, 50, 8203204 (2014).CrossRefGoogle Scholar
10. Liu, C. S., Kuo, L. and Tsai, B. J., New electromagnetic design of miniature AF VCM actuator with low cost,” Journal of Mechanics, 32, pp. 421–426 (2016).CrossRefGoogle Scholar
11. Oh, C. H., Choi, J. H., Nam, H. J., Bu, J. U. and Kim, S. H., Ultra-compact, zero-power magnetic latching piezoelectric inchworm motor with integrated position sensor,” Sensors and Actuators A, 158, pp. 306–312 (2010).Google Scholar
12. 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).Google Scholar
13. Ikushima, K., John, S., Ono, A. and Nagamitsu, S., PEDOT/PSS bending actuators for autofocus micro lens applications,” Synthetic Metals, 160, pp. 1877–1883 (2010).Google Scholar
14. Wang, J. L., Chen, T. Y., Liu, C. W., Chiu, C. W. E. and Su, G. D. J., Polymer deformable mirror for optical auto focusing,” ETRI Journal, 29, pp. 817–819 (2007).Google Scholar
15. 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).Google Scholar
16. Liu, C. S., Chang, Y. H. and Li, H. F., Design of an open-loop controlled auto-focusing VCM actuator without spring plates,” International Journal of Applied Electromagnetics and Mechanics, 51, pp. 61–70 (2016).Google Scholar
17. Liu, C. S. and Ko, S. S., Miniature auto-focusing VCM actuator with excellent shock resistance,” Advanced Science Letters, 8, pp. 83–88 (2012).Google Scholar
18. Liu, C. S., Tsai, B. J. and Chang, Y. H., Design and applications of novel enhanced-performance force sensor,” IEEE Sensors Journal, 16, pp. 4665–4666 (2016).Google Scholar
19. Liu, C. S. and Li, H. F., Design and experimental validation of novel force sensor,” IEEE Sensors Journal, 15, pp. 4402–4408 (2015).Google Scholar
20. Lai, L. K., Tsai, C. L. and Liu, T. S., Design of compact linear electromagnetic actuator for autofocusing in phone camera,” IEEE Transactions on Magnetics, 47, pp. 4740–4744 (2011).Google Scholar
21. Hao, G. and Li, H., Nonlinear analytical modeling and characteristic analysis of a class of compound multi-beam parallelogram mechanisms,” Journal of Mechanisms and Robotics, 7, 041016 (2015).Google Scholar
22. Hao, G., Li, H., He, X., and Kong, X., Conceptual design of compliant translational joints for high-precision applications,” Frontiers of Mechanical Engineering, 9, pp. 9331–9343 (2014).Google Scholar