Liquid crystal display element

A liquid crystal display element, which comprises:

• a substrate provided on one main surface thereof with an electrode;
• three GH liquid crystal layers stacked or juxtaposed on said substrate, each GH liquid crystal layer being different in absorption wavelength from each other and containing a mixture of a host liquid crystal and 0.01-10% by weight of a guest dichroic dye;
• and
• three transparent electrode layers, each formed on each of said GH liquid crystal layers;
• wherein one layer out of said three GH liquid crystal layers contains a mixture of a fluorine-based liquid crystal and an anthraquinone-based magenta or cyan dichroic dye having at least two arylthio groups, and has an absorption wavelength not less than 519 nm;
• and
• wherein said host liquid crystal of each of said three GH liquid crystal layers is a fluorine-based liquid crystal;
• and
• wherein said dichroic dyes of remaining two of said three GH liquid crystal layers contain anthraquinone-based magenta, cyan or yellow dichroic dyes having at least two arylthio groups, respectively.

A liquid crystal display element which comprises;

• a substrate provided on one main surface thereof with an electrode;
• three GH liquid crystal layers stacked or juxtaposed on said substrate, each GH liquid crystal layer being different in absorption wavelength from each other and containing a mixture of a host liquid crystal and 0.01-10% by weight of a guest dichroic dye;
• and
• three transparent electrode layers, each formed on each of said GH liquid crystal layers;
• wherein one layer out of said three OH liquid crystal layers contains a mixture of
• a fluorine-based liquid crystal and a magenta or cyan dichroic dye selected from the group consisting of
• a dichroic dye having an anthraquinone skeleton and four arylthio groups attached to the position 1, 4, 5 and 8 of the anthraquinone skeleton,
• a dichroic dye having an anthraquinone skeleton, two arylthio groups and two hydroxyl groups attached to the position 1, 4, 5 and 8 of the anthraquinone skeleton, and
• a dichroic dye having an anthraquinone skeleton, two arylthio groups and two alkylamino or arylamino groups attached to the position 1, 4, 5 and 8 of the anthraquinone skeleton.

A liquid crystal display element, which comprises:

• a substrate provided on one main surface thereof with an electrode;
• three GH liquid crystal layers stacked or juxtaposed on said substrate, each GH liquid crystal layer being different in absorption wavelength from each other and containing a mixture of a host liquid crystal and 0.01-10% by weight of a guest dichroic dye;
• and
• three transparent electrode layers, each formed on each of said GH liquid crystal layers;
• wherein one layer out of said three GH liquid crystal layers contains a mixture of
• a fluorine-based liquid crystal and a magenta or cyan dichroic dye selected from the group consisting of
• a dichroic dye having an anthraquinone skeleton and four arylthio groups attached to the position 1, 4, 5 and 8 of the anthraquinone skeleton,
• a dichroic dye having an anthraquinone skeleton, two arylthio groups and two hydroxyl groups attached to the position 1, 4, 5 and 8 of the anthraquinone skeleton, and
• a dichroic dye having an anthraquinone skeleton, two arylthio groups and two alkylamino or arylamino groups attached to the position 1, 4, 5 and 8 of the anthraquinone skeleton;
• and
• wherein said dichroic dyes of remaining two of said three GH liquid crystal layers contain anthraquinone-based magenta, cyan or yellow dichroic dyes having at least two arylthio groups, respectively.