Toner Display based on Electrically Induced Movement of Black and White Toner Particles

作者：Kumara K K Chamili^*; Nakamura Sakiko; Miyagawa Nobukazu; Kitamura Takashi

来源：Journal of Imaging Science and Technology, 2014, 58(2): 020504.

DOI：10.2352/J.ImagingSci.Technol.2014.58.2.020504

A reflection-type paper-like display based on electrically induced particle movement is proposed. The principle of the display is based on both black and white toner particles moved by applying voltage. Due to its excellent display characteristics, such as high contrast of black and white images and long image memory time, it is expected that the proposed display (called a %26quot;toner display%26quot;) will find use as electronic paper. The operation principle of the toner display is based on electrically induced movement of charged toner particles. Two types of charged partides (black and white) with opposite polarity are enclosed in the air space between two transparent electrodes. Black toner particles are attracted to the top electrode by electrostatic force across an insulating layer, to display a solid black image. The black toner particles can be transferred to the counter electrode by reversing the polarity of the electric field to display a solid white image. Experiments were carried out to examine the dependence of the display characteristics on the gap between electrodes and the mixing weight ratio of black and white particles. The display contrast and driving voltage were determined by the electrical charge of particles in the display cell. In this study, the triboelectric charges of particles in the display cell were measured using a charge-to-mass (Q/M) meter. These charges were determined to be dependent on the mixing ratio of the two types of particles. The triboelectric charging mechanism between small toner particles is also discussed.

• 出版日期2014-3