Information display, method for preparing it and method for using it

A method for preparing an information display comprising:

• providing a planar electrical optical element including a plurality of pixels, and forming each of the pixels so as to have an optical state controlled by an electrical signal;
• forming the optical element so as to have at least two optical states of a light scattering state and a light transmissive state so that each of the pixels has the optical state reversibly changed between the light scattering state and the light transmissive state;
• forming the optical element so as to display an information image in a planar fashion by combining the optical states of pixels;
• and
• forming the optical element so that the information image is capable to be held with no electrical signal applied, and forming the pixels so that visible light has a transmittance of 60% or higher when the visible light passes from one of surfaces of the electrical optical element to the other surface through a pixel having the transparent state.

A liquid crystal display element comprising:

• a chiral nematic liquid crystal layer sandwiched between a pair of substrates with groups of transparent electrodes thereon;
• at least one of the groups of transparent electrodes having a resin layer provided to have a pretilt angle of 60 deg or greater;
• the resin layer having an alignment surface subjected to rubbing treatment provided thereon;
• the chiral nematic liquid crystal layer and the alignment surface subjected to rubbing treatment being provided so as to be in contact with each other;
• the chiral nematic liquid crystal layer having a first state wherein incoming light is selectively reflected to produce selectively reflected light and a second state wherein incoming light is scattered;
• and
• the selectively reflected light containing a wavelength in an infrared region.