Reflectance Response of Wax-based Rewritable Media Against Pulsed Voltage Application

Abstract

In this study, the transient response of reflectance against pulsed voltage application was measured to analyze the moving mechanism of TiO₂ particles in the wax-based electrophoretic rewritable media. By understanding the TiO₂ particles motion in the media, it would be an advantage to develop the electrophoretic display technology which is expected to has excellent preservation property. The transient response of the reflectance is affected by the media layer thickness and applied voltage between electrodes. Thus experiments were carried out to understand the such dependence. It was observed that, there is a difference in time responses for transition of colors in between black and white. This is assumed due to the TiO₂ particles movement between the electrodes. It is obtained that the TiO₂ particle moves approximately proportional to the applied voltage and TiO₂ particle mobility is 2.5-5.4×10^-11m²/vs. This value is very useful to estimate the response of electrophoretic display.