Liquid crystal display medium, liquid crystal display method and liquid crystal display apparatus for outputting color images

A liquid crystal display medium having a display face and comprising a plurality of display layers laminated parallel to the display face and including a first display layer comprising a chiral structure, and a second display layer having a light scattering state, each display layer comprising a polymer liquid crystal showing a mesomorphic temperature range between its glass transition temperature and the upper limit temperature of a liquid crystal phase for display, wherein the mesomorphic temperature ranges of the first and second display layers do not overlap each other.

A liquid crystal display method, comprising:

• providing a display medium having a display face and comprising a plurality of display layers laminated parallel to the display face, each display layer comprising a polymer liquid crystal having a mesomorphic temperature range between its glass transition temperature and the upper limit temperature of a liquid crystal phase for display, wherein the mesomorphic temperature ranges of said plurality of display layers do not overlap each other;
• and
• controlling the optical densities of the display layers independently from the other display layer(s) by controlling the heating temperatures and cooling rates of the display layers.

A liquid crystal display method, comprising:

• providing a display medium having a display face comprising a plurality of display layers laminated parallel to the display face and including a first display layer comprising a chiral structure, and a second display layer having a light-scattering state, each display layer comprising a polymer liquid crystal having a mesomorphic temperature range between its glass transition temperature and the upper limit temperature of a liquid crystal phase for display, wherein the mesomorphic temperature ranges of the first and second display layers do not overlap each other;
• and
• controlling the optical densities of the display layers independently from the other display layer(s) by controlling the heating temperatures and cooling rates of the display layers.

A liquid crystal display apparatus, comprising:

• a display medium having a display face and comprising a plurality of display layers laminated parallel to the display face, each display layer comprising a polymer liquid crystal having a mesomorphic temperature range between its glass transition temperature and the upper limit temperature of a liquid crystal phase for display, wherein the mesomorphic temperature ranges of said plurality of display layers do not overlap each other;
• and
• control means for controlling the optical densities of the respective display layers independently from the other display layer(s) by controlling the cooling rates and heating temperatures of the display layers.

A liquid crystal display apparatus, comprising:

• a display medium having a display face comprising a plurality of display layers laminated parallel to the display face and including a first display layer comprising a chiral structure, and a second display layer having a light-scattering state, each display layer comprising a polymer liquid crystal having a mesomorphic temperature range between its glass transition temperature and the upper limit temperature of a liquid crystal phase for display, wherein the mesomorphic temperature ranges of the first and second display layers do not overlap each other;
• and
• control means for controlling the optical densities of the respective display layers independently from the other display layer(s) by controlling the heating temperatures and cooling rates of the display layers.