| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a reversible image display medium which can be repeatedly used and can display a high quality image. SOLUTION: In the reversible image display medium 13, cells 116 are formed between two substrates 111 and 112, each cell stores developer DL that includes at least two kinds of dry developer particles WP and BP having triboelectricity and mutually different electrification polarity and mutally different optical reflection densities, by forming an electrostatic latent image on the substrate 111, the developer particles are driven by the electric field based on the electrostatic latent image and the image is displayed. A center line average roughness Ra of the outer surface of the substrate 111 of an image observing side is set between 0.2μm and 0.7μm.</p> |
