RESOLUTION EVALUATION METHOD OF A CAMERA MODULE FOR OPTICAL IMAGE STABILIZER COMPENSATION FOR SHORTENING RESOLUTION MEASUREMENT SPEED OF THE CAMERA MODULE

摘要

PURPOSE: A resolution evaluation method of a camera module for OIS(Optical Image Stabilizer) compensation is provided to process the evaluation method in a data section having low resolution in a short time and precisely process the evaluation method in a data section having high resolution, thereby accurately obtaining an OIS compensation value having excellent resolution.;CONSTITUTION: A sample pattern is arranged(S300). Vibration is applied to a camera module(S400). An image for the sample pattern is obtained by the camera module(S500). An OIS compensation value caused by an actuator is changed in each unit step, and resolution of the image is measured(S600). A slope corresponding to a change ratio of the resolution for a change ratio of the OIS compensation value is calculated(S700). Measurement speed of the resolution is changed corresponding to the slope(S800).;COPYRIGHT KIPO 2013;[Reference numerals] (S100) Step of preparing a camera module; (S200) Step of setting the measurement speed of resolution corresponding to a slope; (S300) Step of arranging a sample pattern; (S310) Step of arranging the sample pattern with a peripheral unit and complementary color to measure resolution for 2-axis direction in a direction perpendicular to each other; (S400) Step of applying vibration to the camera module; (S410) Step of applying vibration in a direction having a slope of 45 degree for each axis; (S500) Step of obtaining an image from the camera module; (S600) Step of measuring the resolution of the image; (S700) Step of calculating the slope; (S800) Step of changing the measurement speed of the resolution according to the slope; (S810) Step of setting a unit step of a hand vibration correction value longer due to an actuator while reducing the value of the slope and setting the unit step of the hand vibration correction value shorter due to the actuator while increasing the value of the slope