Patent ID: 7414777

Claim:
An image display medium comprising: a display substrate that is at least transparent; a back substrate opposing the display substrate with a gap therebetween; at least two or more kinds of moving particle groups that are chargeable and that are different colors, the moving particle groups being enclosed between the display substrate and the back substrate and moving between the substrates in accordance with an electric field formed between the substrates; a transparent liquid for dispersing the moving particles, the transparent liquid being enclosed between the display substrate and the back substrate; and a colored member disposed between the display substrate and the back substrate, and having gaps through which the moving particle groups can move, and being a color that is different from the colors of the moving particle groups, wherein the colored member is structured by a colored particle group whose particles have a volume average particle diameter larger than a volume average particle diameter of particles of the moving particle groups, and wherein a size of the particles of the colored particle group structuring the colored member is greater than or equal to 10 times the size of the particles of the moving particle groups.