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US 10,131,841 B2Granted
Liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsGraziano Archetti, Izumi Saito, Rocco Fortte, Timo Uebel
Life of this patent
Estimating the term…
Abstract
The invention relates to the compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds which contains at least one compound of the formula I in which R1, ring A1, L1, L2, L3, L4, L5, L6, L7, L8, Z1 and m have the meanings indicated in claim 1 and to the use of the LC mixtures in electro-optical displays, especially for the self-aligning VA mode.
Claims25
Liquid-crystalline medium based on a mixture of polar compounds wherein the mixture comprises at least one compound of the formula I,
- in which
- R1 denotes a straight-chain alkyl or alkoxy radical having 1 to 15 C atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CF2O—, —CH═CH—, —⋄—, —⋄⋄—, —CO—O—, or —O—CO— in such a way that O atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by halogen,
- Z1 denotes a single bond, —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —C2F4—, —CHFCHF—, —CH2CHF—, —CFHCF2—, —CF2CHF—, —CHFCH2—, —CH2CF2O—, or —CH═CHCH2O—,
- L1 to L8 each, independently of one another, denote H or alkyl with 1-8 carbon atoms, provided that at least one of L1 to L8 denotes alkyl with 1-8 carbon atoms.
- m denotes 0, 1, 2, 3, 4, 5 or 6.
2 more elements
A compound of the formula I
- in which
- R1 denotes a straight-chain alkyl or alkoxy radical having 1 to 15 C atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CF2O—, —CH═CH—,
- —O—, —CO—O—, or —O—CO— in such a way that O atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by halogen,
- Z1 denotes a single bond, —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —C2F4—, —CHFCHF—, —CH2CHF—, —CFHCF2—, —CF2CHF—, —CHFCH2—, —CH2CF2O—, or —CH═CHCH2O—,
- L1 to L8 each, independently of one another, denote H or alkyl with 1-8 carbon atoms, provided that at least one of L1 to L8 denotes alkyl with 1-8 carbon atoms, and
- m denotes 0, 1, 2, 3, 4, 5 or 6.
3 more elements
Dependencies are inferred from the claim text.