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US 11,434,426 B2Granted
Fast flexoelectro-optic switching based on bimesogen-doped and polymer-stabilized vertical standing helix mode
AssigneeKent State University
InventorsLiang-Chy Chien, Vinay Joshi, Kai-Han Chang
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Abstract
A fast flexoelectro-optic switching device containing bimesogen-doped and polymer-stabilized vertical standing helix (PSVSH) in a cholesteric liquid crystal. The PSVSH device exhibits a response time of less than 0.7 millisecond, high contrast and negligible hysteresis which is suitable for applications including blur-free displays, field-sequential color displays and active optical elements.
Claims19
A bimesogen-doped and polymer-stabilized liquid crystal cell comprising:
- two glass substrates, each said substrate having an electrically conductive material thereon, and a liquid crystal composition contained therebetween;
- said liquid crystal composition comprising one or more calamitic nematic liquid crystals, one or more bimesogen nematic liquid crystals, one or more chiral dopants, one or more mesogens, and an ultraviolet light curing agent.
A process for forming a bimesogen-doped and polymer-stabilized liquid crystal cell, comprising the steps of:
- mixing one or more calamitic nematic liquid crystals, one or more bimesogen nematic liquid crystals, one or more chiral dopants, one or more mesogens, and an ultraviolet light curing agent, and forming a liquid crystal composition;
- and
- placing said liquid crystal composition in a liquid crystal cell.
Dependencies are inferred from the claim text.