Abstract: A display medium having a display face is composed of a plurality of display layers laminated parallel to the display face. Each display layer comprises a polymer liquid crystal having a mesomorphic temperature range between its glass transition temperature and the upper limit temperature of a liquid crystal phase used for display. The mesomorphic temperature ranges of the plurality of display layers do not overlap each other. The optical densities of the display layers are controlled independently from the other by controlling the heating temperatures and cooling rates of the display layers, and the gradation of each color can be also controlled, so that a full-color display can be realized.