Analysis and Optimal Design of a Novel Actuator System for a Camera Module

Tae-Hoon Kwon,Jong-Suk Ro

doi:10.1109/access.2020.3048001

Tae-Hoon Kwon, Jong-Suk Ro

Open Access

https://doi.org/10.1109/access.2020.3048001

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Abstract

Owing to the fourth industrial revolution and the recent trend for compact, high-performance, and multifunctional electrical devices, the demand for a small and high-performance camera module has dramatically increased. To address this, in this study, a novel, miniaturized, high-performance, low-cost multifunctional camera module with optical image stabilization (OIS) via a novel two-axis motional actuator with 1-Stage is proposed. To date, a systematic analysis and optimal design method for the actuators of camera modules has not been proposed yet. Accurate and rapid analysis and optimal design methods are proposed herein. Based on the proposed methods, it is possible to reduce the time and cost for the development of actuators for camera modules. The usefulness of the proposed actuator system for small, high performance, and multifunctional camera modules, and the proposed analysis and optimal design method were verified experimentally in this study.

Highlights

The voice-coil-motor (VCM) type and the borrowed VCM actuator are the key components that are used in camera modules represented by smartphones and digital single-lens reflex (DSLR) cameras that convert electronic and electrical signals generated within the module into mechanical movements
We intended to show that the optimization model leads to additional internal space and improved performance compared with the existing one, and that mass production of the optimal chamfered magnet and coil can reduce the overall manufacturing cost of the optical image stabilization (OIS) VCM actuator
JMAG Designer and MATLAB, the design and setting of the chamfer magnet angle and coil diameter parameters in the VCM actuator method were conducted, and the Lorentzian force was simulated according to the optimization

Summary

Introduction

The voice-coil-motor (VCM) type and the borrowed VCM actuator are the key components that are used in camera modules represented by smartphones and digital single-lens reflex (DSLR) cameras that convert electronic and electrical signals (power) generated within the module into mechanical movements. Various methods have been proposed and applied to date in addition to the aforementioned studies and suggestions to miniaturize and improve performance of VCM actuator camera modules for OIS [9]–[21].

Results

Conclusion