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http://dx.doi.org/10.5302/J.ICROS.2009.15.12.1197

A Research of Power-Efficient Driving Scheme for Auto-Focus on Image Sensor Module  

Cha, Sang-Hyun (삼성전기 기술총괄 UM 솔루션랩)
Park, Chan-Woo (삼성전기 기술총괄 UM 솔루션랩)
Lee, Yuen-Joong (삼성전기 기술총괄 UM 솔루션랩)
Hwang, Byoung-Won (삼성전기 기술총괄 UM 솔루션랩)
Kwon, Oh-Jo (삼성전기 기술총괄 UM 솔루션랩)
Park, Deuk-Hee (삼성전기 기술총괄 UM 솔루션랩)
Kwon, Kyoung-Soo (삼성전기 기술총괄 UM 솔루션랩)
Lee, Jae-Shin (삼성전기 기술총괄 UM 솔루션랩)
Hwang, Shin-Hwan (삼성전기 기술총괄 UM 솔루션랩)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.15, no.12, 2009 , pp. 1197-1202 More about this Journal
Abstract
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.
Keywords
auto-focus; driver IC; piezoelectric actuator; power-efficient; image sensor module;
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