Patent ID: 8174491

Claim:
An image display medium comprising: a pair of substrates, disposed with a separation therebetween, at least one of the pair of substrates being transparent; a transparent dispersion medium that is enclosed between the pair of substrates; one or more kind of colored particles, each kind of the colored particles being colored a predetermined color and being dispersed in the dispersion medium, each kind of the colored particles having predetermined charge characteristics or predetermined magnetic properties and being able to migrate between the pair of substrates; and larger sized colored particles that have a different color and a larger particle size than those of the colored particles, the larger sized colored particles being disposed so that the colored particles are able to pass through the separation, the larger sized colored particles having charge characteristics or magnetic properties which are different from the colored particles, and the larger sized colored particles being able to move, wherein the image display medium includes an amount of larger sized colored particles such that a substantially whole visible area of a view side of the pair of substrates can be covered by at least one layer of the larger sized colored particles.