A mobile auto-focus actuator based on a rotary VCM with the zero holding current.

@article{Kim2009AMA,
  title={A mobile auto-focus actuator based on a rotary VCM with the zero holding current.},
  author={Kyung-Ho Kim and Seung-Yop Lee and Sookyung Kim},
  journal={Optics express},
  year={2009},
  volume={17 7},
  pages={5891-6}
}
In this work, an auto-focus actuator moving lens in mobile phone cameras is developed by applying a rotary VCM (voice coil motor). A novel inclined cam structure is used to convert the rotational motion by the VCM by into the linear motion of the focusing lens. The new focusing design enables the zero holding current required to maintain the lens module in… CONTINUE READING