| abstract |
(57) [Summary] [PROBLEMS] To display a high-quality image using a reversible image display medium that can be used repeatedly. A cell (11) between two substrates (111, 112). 6 contains at least two types of dry developing particles WP and BP having triboelectric charging properties, each having a different charging polarity and a different optical reflection density, and an electric field corresponding to an image to be formed on the developing particles. The applied voltage drives the developing particles to display an image. 0.3 V / μ m and 3.0 V / μm or less. |