<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Endowed with Hall-effect sensors and voice coil motors, cell phone cameras as intelligent systems are capable to execute auto-focusing for acquiring sharp image. For the use of cell phone cameras, this study presents an innovative auto-focusing module. When coils are powered, induced magnetic fields generate N and S poles around iron cores in the actuator. Unlike voice coil motors that employ Lorentz force, the motion of the moving part in this study is arisen from a magnetic pole property - same poles repel each other while opposite poles attract each other. Using a threedimensional finite element method, we calculate electromagnetic and mechanical characteristics including current variation of coils, displacement and velocity of the moving part, and actuation force. Simulation results show that the proposed auto-focusing module achieves rapid response and low power consumption.</p></abstract>

Endowed with Hall-effect sensors and voice coil motors, cell phone cameras as intelligent systems are capable to execute auto-focusing for acquiring sharp image. For the use of cell phone cameras, this study presents an innovative auto-focusing module. When coils are powered, induced magnetic fields generate N and S poles around iron cores in the actuator. Unlike voice coil motors that employ Lorentz force, the motion of the moving part in this study is arisen from a magnetic pole property - same poles repel each other while opposite poles attract each other. Using a threedimensional finite element method, we calculate electromagnetic and mechanical characteristics including current variation of coils, displacement and velocity of the moving part, and actuation force. Simulation results show that the proposed auto-focusing module achieves rapid response and low power consumption.

Design of Auto-Focusing Modules in Cell Phone Cameras

International Journal on Smart Sensing and Intelligent Systems

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Design of Auto-Focusing Modules in Cell Phone Cameras"}

Endowed with Hall-effect sensors and voice coil motors, cell phone cameras as intelligent systems are capable to execute auto-focusing for acquiring sharp...

Design of Auto-Focusing Modules in Cell Phone Cameras

Published Online: Dec 01, 2011

Page range: 568 - 582

Received: Aug 20, 2011

Accepted: Nov 03, 2011

DOI: https://doi.org/10.21307/ijssis-2017-457

© 2011 L. K. Lai et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.