Advertisement

Microsystem Technologies

, Volume 25, Issue 1, pp 277–281 | Cite as

Design of VCM actuator for optical zooming smartphone cameras

  • Yu-Hao Chang
  • Cheng-Chi Hu
  • Chang-Lin Hsieh
  • Chien-Sheng Liu
Technical Paper
  • 28 Downloads

Abstract

The function of optical zooming is really rare in smartphone cameras due to its appearances and dimensions now. The manufactures need to provide a better optical performance and make a new gimmick to attract consumers. As a result, a novel VCM actuator with optical zoom for smartphone cameras is proposed in this paper, it has a simpler structure when compared to stepping motor smartphone cameras. The paper presents a segmented magnetic equivalent circuit method to analyze the magnetic characteristics of proposed VCM actuator and further verified by a commercial finite element model software. Furthermore, the performance of the proposed optical zoom VCM actuator was verified by constructing a laboratory-built prototype, the experimental results shows that the proposed VCM actuator has good positioning accuracy and good dynamic response.

Notes

Acknowledgements

The authors gratefully acknowledge the financial support provided to this paper by the Ministry of Science and Technology of Taiwan under Grant Nos. MOST 105-2221-E-194-013-MY5.

References

  1. Cao WZ, Yang XH, Tian XB (2014) Numerical evaluation of size effect in piezoelectric micro-beam with linear micromorphic electroelastic theory. J Mech 30:467–476CrossRefGoogle Scholar
  2. Chang YH, Lu CJ, Liu CS, Liu DS, Chen SH, Liao TW, Peng WY, Lin CH (2017) Design of miniaturized optical image stabilization and autofocusing camera module for cellphones. Sens Mater 29(7):989–995Google Scholar
  3. Chen MS, Chen PJ, Chen M, Lin YH (2014) An electrically tunable imaging system with separable focus and zoom functions using composite liquid crystal lenses. Opt Express 22:11427–11435CrossRefGoogle Scholar
  4. Chiu CW, Chao PCP, Kao NYY, Young FK (2008) Optimal design and experimental verification of a magnetically actuated optical image stabilization system for cameras in mobile phones. J Appl Phys 103:07F136-07F136–3CrossRefGoogle Scholar
  5. Hsieh CL, Wang HY, Chang YH, Liu CS (2017) Design of VCM actuator with the chamfered edge magnet for cellphone. Microsyst Technol 23(12):5293–5302CrossRefGoogle Scholar
  6. Hsieh CL, Chang YH, Chen YT, Liu CS (2018) Design of VCM actuator with L-shape coil for smartphone cameras. Microsyst Technol 24(2):1033–1040CrossRefGoogle Scholar
  7. Ko HP, Jeong H, Koc B (2009) Piezoelectric actuator for mobile auto focus camera applications. J Electroceram 23:530–535CrossRefGoogle Scholar
  8. Lin YH, Liu YL, Su GD (2012) Optical zoom module based on two deformable mirrors for mobile device applications. Appl Optics 51:1804–1810CrossRefGoogle Scholar
  9. Liu CS, Chang YH, Li HF (2016) Design of an open-loop controlled auto-focusing VCM actuator without spring plates. Int J Appl Electromagn Mech 51:61–70CrossRefGoogle Scholar
  10. Liu CS, Tsai BJ, Chang YH (2017) A compact low-cost camera module with modified magnetic restoring force. J Mech 33(4):475–482CrossRefGoogle Scholar
  11. Lukac R, Martin K, Platanoitis KN (2004) Digital camera zooming based on unified CFA image processing steps. IEEE Trans Consum Electron 50(1):15–24CrossRefGoogle Scholar
  12. Miks A, Novak J (2010) Analysis of two-element zoom systems based on variable power lenses. Opt Express 18:6797–6810CrossRefGoogle Scholar
  13. Milecki A, Ortmann J (2017) Electrohydraulic linear actuator with two stepping motors controlled by overshoot-free algorithm. Mech Syst Signal Proc 96:45–47CrossRefGoogle Scholar
  14. Momen M, Datta S (2009) Analysis of flux leakage in a segmented core brushless permanent magnet motor. IEEE Trans Energy Convers 24(1):77–81CrossRefGoogle Scholar
  15. Qian JB, Chen XD, Chen H, Zeng LZ, Li XQ (2013) Magnetic field analysis of lorentz motors using a novel segmented magnetic equivalent circuit method. Sensors 13:1664–1678CrossRefGoogle Scholar
  16. Qu RH, Lipo TA (2004) Analysis and modeling of air-gap and zigzag leakage fluxes in a surface-mounted permanent-magnet machine. IEEE Trans Ind Appl 40:121–127CrossRefGoogle Scholar
  17. Tsai WB, Chang TY (1999) Analysis of flux leakage in a brushless permanent-magnet motor with embedded magnets. IEEE Trans Magn 35(1):543–547CrossRefGoogle Scholar
  18. Walther A (2001) Angle eikonals for a perfect zoom system. J Opt Soc Am A 18:1968–1971CrossRefGoogle Scholar
  19. Wooters G, Silvertooth EW (1965) Optically compensated zoom lens. J Opt Soc Am A 55:347–351CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Mechanical Engineering and Advanced Institute of Manufacturing with High-Tech InnovationsNational Chung Cheng UniversityChiayi CountyTaiwan

Personalised recommendations