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US 2020/0347302 A1Published application
Liquid crystal composition containing a five-membered heterocyclic ring, reverse-mode polymer dispersed liquid crystal element, and associated selectively dimmable device
AssigneeNitto Denko Corporation
InventorsSazzadur Rahman Khan, Hiep Luu
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Abstract
Described herein are liquid crystal compositions containing a five-membered heterocyclic ring that can allow for the adjustment of their refractive indices under the application of an electric field. In addition, selectively dimmable reverse-mode polymer dispersed liquid crystal (PDLC) elements and devices using the aforementioned compositions are also described, which are transparent when no voltage is applied and opaque when a voltage is applied.
Claims24
A liquid crystal composition comprising a first liquid crystalline compound represented by the following formula:
- wherein Z is —CH═N—, —N═CH—, —CH2—NH—, —NH—CH2—, —C(O)O—, —OC(O)—, —C(O)—NH—, —NH—C(O)—, —O—, —NH—C(O)—NH—, or a bond;
- R1, R2, R3, R4, R5, R6, R7 and R8 are independently H, F, Cl, Br, —CN or —NCS;
- Q1 and Q2 are independently CH, substituted C, or N;
- X is C3-8 hydrocarbyl or C2-7 hydrocarbyloxy;
- and
- Y is H or F.
3 more elements
Dependencies are inferred from the claim text.