A study of the causal relationship between the electric double layer at the Interface between the liquid crystal Layer and the alignment layer and display defects in liquid crystal displays

Abstract

The display failure of FFS-LCD is an issue that has not been clarified. In order to understand this issue, it is necessary to understand the phenomena at the interface between the liquid crystal and the alignment film. In this study, since the device structure of FFS-LCD is complex, the device structure was simplified for the simulation study of the interface, and the dominant factors of the display failure were studied using COMSOL Multiphysics, a finite element CAE simulator software. As a result, it was found that in addition to the known effect of ion density, electric potential is another factor that affects the display failure. These factors affect the electric double layer at the interface and cause the display failure.