Single-layered multi-color electrowetting display by using ink-jet-printing technology and fluid-motion prediction with simulation

Abstract

This paper describes a single-layered multi-color electrowetting display (EWD) by using ink-jet-printing (IJP) technology and comparing different pattern electrodes with the use of the numerical investigations of ANSYS FLUENT (R). This work consists of two parts: the first describes the design of implementing a single-layered multi-color EWD and the second demonstrates the application of ANSYS FLUENT (R) simulation in different pattern electrodes settings on the proposed EWD. The single-layered multi-color EW device was evaluated by using various colored oils without adopting a color filter. The single-layered multi-color EWD at a driving voltage of 25 V can achieve a maximum aperture ratio and reflectivity of 80% and 38.5%, respectively. The colored saturation of R, G, B oils can increase to 50% (NTSC: 13.3-27.8%). In addition, a radiate electrode at the required viewable area condition of 85% and force 5 * F(k), which results in ink stable contraction and a shorter response time of 50% (radiate vs. square), was proposed. The experimental results and simulation demonstrate that ink-jet-printing (IJP) technology along with the use of radiate electrodes can result in a single-layered multi-color EWD with a shorter response time.