Design and Characterization of Miniature Auto-Focusing Voice Coil Motor Actuator for Cell Phone Camera Applications

作者：Liu Chien Sheng^*; Lin Psang Dain; Lin Po Heng; Ke Shun Sheng; Chang Yu Hsiu; Horng Ji Bin

来源：IEEE Transactions on Magnetics, 2009, 45(1): 155-159.

DOI：10.1109/TMAG.2008.2006564

• Actuators
• cameras
• linear motors
• self-focusing
• simulation

When designing an auto-focusing actuator for use in cell phone cameras, it is essential to minimize the device size, maximize the positioning repeatability, and minimize the power consumption. In a previous study, we presented a miniature auto-focusing voice coil motor (VCM) actuator for cell phone camera applications in which the lens was precisely positioned by a closed-loop feedback signal generated by a Hall element. Our study characterizes the performance of this device by using an experimental approach. The results show that the proposed actuator is not only smaller than a conventional VCM actuator with an open-loop positioning system, but also has improved positioning repeatability, a more rapid response, and lower power consumption.

• 出版日期2009-1