Electrically tunable reflection color of chiral ferroelectric nematic liquid crystals
AssigneeKent State University
InventorsAntal Jakli, Chenrun Feng
Life of this patent
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Abstract
A doped ferroelectric nematic liquid crystal includes a chirality-induced stabilization of the polar nematic order, improved relaxation time for electro-optical switching, and selective reflection in the visible wavelength that is reversibly tunable. The ferroelectric nematic liquid crystal is doped with a chiral dopant selected from benzoic acid, 4-hexyl-,4-[[(1-methylheptyl)oxy]carbonyl]phenyl ester (ZLI811) and BDH1281.
Claims15
A liquid crystal cell comprising a doped ferroelectric nematic liquid crystal including a ferroelectric nematic liquid crystal doped with a chiral dopant, wherein the chiral dopant is selected from benzoic acid, 4-hexyl-,4-[[(1-methylheptyl)oxy]carbonyl]phenyl ester and the formula
- and
- electrodes for providing an in-plane electric field of from 0.02 V/μm to 0.10 V/μm;
- wherein the doped ferroelectric nematic liquid crystal is reversibly tunable with application of the in-plane electric field of from 0.02 V/μm to 0.10 V/μm.
A liquid crystal cell comprising
- a doped ferroelectric nematic liquid crystal including a ferroelectric nematic liquid crystal doped with a chiral dopant, wherein the chiral dopant is present at a weight percent of from 1 wt. % to 4 wt. %, wherein the doped ferroelectric nematic liquid crystal is in the N*F phase, wherein the ferroelectric nematic liquid crystal is 4-[(4-nitrophenoxy)carbonyl]phenyl2,4-dimethoxybenzoate, wherein the chiral dopant is selected from benzoic acid, 4-hexyl-,4-[[(1-methylheptyl)oxy]carbonyl]phenyl ester and the formula
- and
- electrodes for providing an in-plane electric field of from 0.02 V/μm to 0.10 V/μm;
- wherein the doped ferroelectric nematic liquid crystal is reversibly tunable with application of the in-plane electric field of from 0.02 V/μm to 0.10 V/μm.
Dependencies are inferred from the claim text.