Liquid crystal display black light leakage correlation between VA and IPS by curvature

Abstract

Curved displays have received much public and various media interest on display at exhibitions. Curved displays that have been released to date are divided into organic light-emitting diode(OLED) and liquid crystal display (LCD) types. In this study, the characteristics of LCD quality by curvature were measured, and we predicted the possibility of curving a LCD. Two 55 inch flat LCD panels [in plane switching (IPS) mode and vertical alignment (VA) mode] were measured with the same curvature jig to confirm how different black light leakage levels occurred by curvature under the same conditions. Black luminance was measured at nine points from the left of the panel to the right end using luminance measuring equipment. Black light leakage was visually confirmed for panels (VA and IPS) under darkroom conditions. In addition, we confirmed that VA-mode black light leakage was 10 times lower than that of IPS mode. Furthermore, we measured a radius of curvature divided by 4, 5, and 6 m and confirmed that the trend in black light leakage changed with the radius of the curvature.