Abstract
The movement of conductive toner in a rewritable reflection-type display cell, in which conductive toners and white particles are enclosed, was investigated. The conductive toners in the display cell moved at low threshold voltage in the absence of white particles, and the reflection density reached saturation at 200V. The coverage of the conductive toners on the electrode surface, covering power, was ca. 50% above the saturation. On the other hand, the reflection density showed saturation, ca. 26%, at the voltage of 300V or above in the presence of the white particles. These results indicates an increase in the threshold voltage for the toner movement by the addition of the white particles. Further investigations in this study revealed that a particle-free space of ca. 50% is required for the movement of the conductive toner particles in the display cell.
