Movement of Triboelectrically Charged Particles in Toner Display

Abstract

The mechanism of toner display based on an electrical movement of black and white charged particles has been investigated. Two types of black conductive toner and white fused silica particles charged in the different electric polarity are enclosed between a two electrodes coated with charge transport layer. The particle movement is controlled by the external electric field applied between two transparent electrodes. The toner is fixed on the cathode by an electrostatic force across the CTL to display a black image. The toners can be put back to the counter electrode by applying a reverse electric field, and a white image is formed.The black and white solid images are displayed by the switch of polarity of applied voltage in toner display cell. The polarity of charge and the value of charge to mass ratio of two particles were measured by observation of the particle separation on the surface-type electrodes and using q/m meter, respectively.