Enhanced image quality of OLED transparent display by cholesteric liquid crystal back-panel

Abstract

The transparent active-matrix organic light-emitting diode (AM-OLED), which is a self-luminous polarizer-free display, is regarded as one of the most potential candidate of high-transparency transparent display. However, the image quality of the transparent AM-OLED depends strongly on the background, resulting in poor contrast and image distortion. In this work, a transparent display with high image quality that combines AM-OLED and dye-doped cholesteric liquid crystal is demonstrated. Its electro-optical properties are optimized, enabling the transparent display to be not only compatible with active-matrix driving but also the contrast and distortion are sufficiently improved without sacrificing the transparency.