近年来，液晶显示技术的发展，有了质的飞跃，液晶显示器正向更大尺寸的台式计算机监视器和高分辨率、高亮度、大屏幕彩色液晶投影电视机等方向迅速发展。但是其制作难度已超过超大规模集成电路。其成品率最高也只有60%～70%。对TFT-AMLCD屏的缺陷进行激光修补和采用冗余技术是提高其成品率的重要手段，而要进行缺陷修补，首先得确定缺陷的类型和精确位置，这就需要相应的缺陷检测技术。

Detect defects in liquid crystal displays in recent years，liquid crystal display technology，has been a qualitative leap Liquid crystal displays are larger desktop computer monitors and high-resolution，high brightness，large screen color LCD projection television sets，the direction of rapid development．However，the difficulty of its production has exceeded VLSI。Its maximum yield only 60% ~ 70%．TFT-AMLCD screen for defects in repair and use of laser redundancy technology to improve their yields are an important means，and to repair defects，first of all to identify deficiencies in the type and precise location，which requires the corresponding defect detection technology．