US 2024/0318081 A1 · LIQUID CRYSTAL COMPOSITION AND BISTABLE LIQUID CRYSTAL DIMMING DEVICE APPLYING SAME

Abstract

The present invention relates to a liquid crystal composition. The liquid crystal composition comprises four compounds having different structural formulas and a chiral compound. The four compounds having different structural formulas are at least one compound selected from general formula I, at least one compound selected from general formula II, at least one compound selected from general formula III, and at least one compound selected from general formula IV, respectively. By optimizing the content of each component in the liquid crystal composition, a clearing point is improved while reducing a phase transition point of the N-TB. Also provided is a bistable liquid crystal dimming device prepared by applying the liquid crystal composition, which widens the working temperature range of the bistable liquid crystal dimming device, and improves the value of the bistable liquid crystal dimming device in practical applications.

Claims24

Dependent claims

A liquid crystal composition, comprising at least one compound selected from general formula I, at least one compound selected from general formula II, at least one compound selected from general formula III, at least one compound selected from general formula IV and at least one chiral compound

wherein, R1 and R2 are each independently —H, —F, —Cl, —CN, —NCS or an alkyl group having 1-25 C atoms;
MG1 and MG2 are each independently a mesogenic group;
X is a spacer group comprising 1, 3 or 5 to 40 C atoms;
H1, H2, H3, H4, H5, H6, H7, H8 and H9 are each independently a first cyclic group selected from
A1, A2 and A3 are each independently —COO—, —OCO—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —C≡C—, —CH═CH—, —CF2CF2—, —CF═CF—, a single bond or —(CH2)a—, wherein a denotes an integer from 2 to 10;
R3, R4, R5, R6, R7 and R5 are each independently —CN, —F, —Cl, —NCS, —OCF3, —CF3 or an alkyl group having 1 to 25 C atoms.

3 more elements

Dependencies are inferred from the claim text.

Liquid crystal composition and bistable liquid crystal dimming device applying same

Life of this patent

Liquid crystal composition and bistable liquid crystal dimming device applying same

Life of this patent

Abstract

Claims24