Abstract
The response time of a toner display with charged conductive toners has been investigated. The display consists of the conductive toners and white particles which are inserted between two substrate electrodes. Its indication of images are based on absorption and scattering of ambient light at the image and the non-image area, respectively. The response time of the display to applied voltages was measured using a photon counting method. The response time for switching from black to white display was 1.1 ms at an applied voltage of 500V, and the reverse process took 1.0ms. The response time depended on the amount of the particles enclosed in the display cell. From the observation of particle distribution in the toner display cell, it has been confirmed that the positively charged black toners and negatively charged white particles adhered to the separate electrode surfaces and air gap was formed between the two electrodes. These results agreed with the concept that the cell displays black when the negatively charged white particles are replaced by the positively charged black toners under an application of negative bias voltages or vice versa.
