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A Research of Power-Efficient Driving Scheme for Auto-Focus on Image Sensor Module
차상현,박찬우,이연중,황병원,권오조,박득희,권경수,이재신,황신환,Cha, Sang-Hyun,Park, Chan-Woo,Lee, Yuen-Joong,Hwang, Byoung-Won,Kwon, Oh-Jo,Park, Deuk-Hee,Kwon, Kyoung-Soo,Lee, Jae-Shin,Hwang, Shin-Hwan Institute of Control 2009 제어·로봇·시스템학회 논문지 Vol.15 No.12
We present a power-efficient driving scheme that consists of piezoelectric actuator and driver IC for AF (Auto-Focus) on ISM (Image Sensor Module). The piezoelectric actuator is more power-efficient than conventional voice coil motor actuator. And high power-efficiency driver IC is designed. So the proposed driving scheme using designed piezoelectric actuator and driver IC is more close to recent trend of green IT. The diver IC should guarantee fast and accurate performance. So, the optimum driving method and high accurate frequency synthesizer are proposed. The die area of designed driver IC is $2.0{\times}1.6mm^2$ and power consumption is 2.8mW.