提出了一种在小型液晶屏盒内缺陷检测中消除纹理影响的方法, 并成功制作了国内首台小型液晶屏盒内缺陷自动光学检测仪。本方法的基本原理是: 采集标准液晶屏图像, 利用其图像数据建立补偿矩阵, 在检测的预处理过程中使用补偿矩阵消除纹理。这种方法有效解决了液晶屏纹理影响检测结果的难题。理论分析及现场实验结果表明, 该方法达到消除液晶屏纹理的同时完整保留缺陷的目的, 使液晶屏盒内缺陷自动检测的准确性大大提高。

A method of eliminating texture in defects inspection of LC cell of small-size Liquid Crystal Display (LCD) is proposed, and the domestic first LC cell defects Automatic Optical Inspection (AOI) for small-size LCD was made. The basic principle of this method is to eliminate texture in preprocessing of detecting LCD image by compensation matrix which is established from the image of standard LCD. The method of eliminating texture presented solves the problem that the texture which appears in LCD image will makes it more difficult to detect defects. Theoretical analysis and experimental results show that, by using this method, the texture is eliminated and the defects are kept completely, and the detection accuracy of AOI is improved greatly.