Colored oil for electrowetting displays

Abstract

Electrowetting displays combine high transmittance, bright colors, and low-power consumption. Like liquid crystal displays, they also allow all modes of operation: reflective, transmissive, transparent, and transflective. This paper reports the latest improvements related to the main optical component, the light-absorbing oil film, and its influence on the display properties. A new set of black mixtures was developed with improved dyes that allow high optical efficiency. High-contrast transmissive displays were fabricated with good switching properties. Moreover, the reflective displays show very low oil backflow levels, which are beneficial for power reduction. The reliability of such new oils was also studied, considering their bleaching and miscibility properties. © 2013 Copyright The Korean Information Display Society.