Measurement of human visual perception for Mura with some features

Abstract

Abstract— The defects of flat‐panel liquid‐crystal display are usually not uniform, and the defects are called as “Mura.” There are many factors that cause the Mura phenomenon. At present, the human eyes define the seriousness of Mura, and different operators define the same Mura phenomenon with different meanings. For this reason, there have been many conflicts between the suppliers of flat‐panel liquid‐crystal display and customers. In order to solve the conflicts between the suppliers and customers, some researchers proposed a regression equation for the luminance contrast threshold and the size of Mura. In addition to the effect of Mura size on luminance contrast threshold, this study investigated the relationship between other factors and luminance contrast threshold. An analysis of the results show that Mura size, polarity of Mura, Mura position, and different color backgrounds significantly affect the visual contrast threshold. However, polarity did not significantly affect visual contrast threshold. In this study, it was found that Mura size was more important than the other factors for visual contrast threshold. The results of this study is expected to be referenced for inspection by the LCD industry.