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AssigneeIndustrial Technology Research Institute
InventorsDeepak Shukla, Krishnan Chari
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The present invention relates to photo-tunable dopant compositions comprising a photo-reactive chiral compound capable of undergoing a photochemical reaction resulting in the loss of chirality, and a triplet sensitizer. The present invention also relates to a display comprising a substrate, a liquid crystalline layer thereon, wherein the liquid crystalline layer comprises a nematic host, at least one chiral dopant, a photo-reacted compound, and a triplet sensitizer, and at least one transparent conductive layer. The present invention also relates to a method of tuning a cholesteric liquid crystal material comprising providing at least one mesogenic compound, at least one triplet sensitizer, and at least one photo-reactive chiral compound; combining the at least one mesogenic compound, at least one triplet sensitizer, and at least one photo-reactive chiral compound to form a mixture; and irradiating the mixture for a period of time.
A display comprising a substrate, a liquid crystalline layer thereon, wherein said liquid crystalline layer comprises a nematic host, at least one chiral dopant, a photo-reacted compound, and a triplet sensitizer, and at least one transparent conductive layer, wherein said at least one chiral dopant comprises an aromatic ring or ring system in which the chiral carbon is bound directly to the ring or beta to the ring through a carbon, a substituted carbon or heteroatom, and a photocleavable leaving group attached directly to the chiral carbon.
A photo-tunable dopant composition comprising a photo-reactive chiral compound, wherein said photo-reactive chiral compound is capable of undergoing a photo-chemical reaction resulting in the loss of the chirality of said photo-reactive chiral compound, and a triplet sensitizer, said photo-reactive chiral compound comprising an aromatic ring or ring system in which the chiral carbon is bound directly to the ring or beta to the ring through a carbon, a substituted carbon or heteroatom, and a photocleavable leaving group attached directly to the chiral carbon.
Dependencies are inferred from the claim text.