Colour display device e.g. for portable computer or TV

摘要

A colour display device includes two mutually parallel plates (3,6) provided with externally controlled electrodes on one of their sides to form a sealed off space (1) between for containing the colour indicating medium.The medium is a colourless or monochrome chemical compound in which with application of an electric field another reversible change takes place into a colour specific to the medium, through migration of ions as a result of a local alteration in pH value.