POINT DEFECT DETECTING DEVICE AND POINT DEFECT DETECTING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a point defect detecting device and a point defect detecting method capable of detecting point defect at high precision.;SOLUTION: A point defect detecting system 1 comprises: a liquid crystal panel 23 displaying images; a pattern generator 3 controlling for displaying a plurality of test images by changing the voltage values applied to the liquid crystal panel 23; a CCD camera 4 photographing the plurality of the test images; a pixel analyzing means detecting point defect candidate pixels which become point defect candidates for each of the photographed images; an image integration means integrating the brightness values of the point defect candidate pixels with the same pixel position in a plurality of photographed images by recognizing the pixel position and the brightness value of these point defect candidate pixels;and a defect detecting means detecting the pixel whose integrated brightness value of the point defect candidate pixels is larger than a predetermined detection threshold value as the point of defect pixel.;COPYRIGHT: (C)2009,JPO&INPIT