Design and Simulation of a New Miniature Camera Module Using Voice Coil Motor for Optical Image Stabilization

Abstract

Abstract. This paper proposes a new design for miniature camera module, which is mainly used to realize optical image stabilization for mobile device with dual-camera. It can compensate the 3 degrees vibration disturbance introduced by the user's hand-shake. Finite element analysis (FEA) and design of experiments (DOE) are introduced to find the optimum design. Controller design and simulations based on actual hand-shake data collected from the gyro sensors are presented. Simulation results show that the designed camera module can compensate hand-shake up to 50Hz in 3 degrees.

Stability Driven Optimal Controller Design for High Quality Images

“…In addition, drift compensation filter (DCF) to reduce the DC component of gyro sensor output was developed including PID controllers [15]. In [16], hand vibrations were measured and modeled by using Discrete Fourier Transform (DFT). In the paper, as plant modeling, second order systems were used.…”

“…In the paper, as plant modeling, second order systems were used. As a modern controller, current estimator based state feedback control was also developed [16]. However, these conventional methods have limitations on improving the performance of the closed loop systems because the designed controllers do not take flexible shapes to the given plant models, i.e., OIS actuators.…”

“…was modeled and applied to OIS systems. The hand vibrations were measured and analyzed in the previous study [16]. In general, Closed loop systems are compared in Figure 14.…”

“…For tests in the time domain, the hand vibration signal d x,y was modeled and applied to OIS systems. The hand vibrations were measured and analyzed in the previous study [16]. In general, d x,y is located at a low frequency range below 20 Hz.…”