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US 9,714,381 B2Granted
Liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsGraziano Archetti, Melanie Klasen-Memmer, Rocco Fortte, Sabine Schoen
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Abstract
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds which contains at least one compound of the formula I, and at least one additional compound, and to the use of the LC mixtures for an active- or passive matrix addressed displays, in particular based on the VA, PSA, PS-VA, IPS, FFS, PS-IPS, PS-FFS technology, preferably in optical displays for the self-aligning VA mode.
Claims22
A liquid-crystalline medium comprising a mixture of polar compounds, including in said mixture
- at least one compound of formula I,
- in which
- R1 denotes an 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—, —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,
- L1, L2 and L3 each, independently of one another, denote H, F, Cl, CF3, CHF2 or alkyl with 1-5 carbon atoms, preferably F or alkyl, and
- m denotes 0, 1, 2, 3, 4, 5 or 6,
- and
- at least one compound of the formulae I-A, I-B, I-G OR I-J,
- in which
- R1* and R2 each, independently of one another, denote an 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—, —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,
- a 0 or 1, and
- L1 and L2 each, independently of one another, denote H, F, Cl, CF3 or CHF2.
10 more elements
Dependencies are inferred from the claim text.