Design of Auto-Focusing Modules in Cell Phone Cameras

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Provided by: International Journal on Smart Sensing and Intelligent Systems
Topic: Hardware
Format: PDF
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 paper 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 paper is arisen from a magnetic pole property - same poles repel each other while opposite poles attract each other.
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