Patent ID: 7499211

Claim:
A display medium, comprising: first substrate and a second substrate, at least one of the first and second substrates having transparency; a particle group enclosed between the first and second substrates, the particle group migrating between the first and second substrates in response to an electric field formed between the pair of substrates; a dispersion medium that is enclosed between the first and second substrates and disperses the particle group; a porous member disposed between the first and second substrates and having a plurality of pores that allow passage of the particle group in a direction from a first substrate side to a second substrate side of the porous member, in a direction from the second substrate side to the first substrate side of the porous member, and in a direction perpendicular to a direction in which the first and second substrates are opposed; and embedded members that partition the porous member into specific regions and that are embedded inside at least a part of the pores in the porous member that are present along the direction in which the first and second substrates are opposed.