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US 12,552,991 B2Granted
Liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsSven Christian Laut, Sabrina Pfeiffer, Philipp Hans Fackler
Life of this patent
Estimating the term…
Abstract
Liquid-crystalline (LC) media having positive dielectric anisotropy and liquid-crystal displays (LCDs) containing these media, especially displays addressed by an active matrix and in particular to LC displays of the TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, SA-HB-FFS, SA-XB-FFS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA type.
Claims26
A liquid-crystalline medium, comprising
- one or more compounds of formula I,
- and
- one or more compounds of the formula XXXa,
- or
- one or more compounds of the formula XXXIVa,
- and having a positive dielectric anisotropy,
- wherein
- R0 is a straight chain alkyl or alkoxy radical that is unsubstituted or halogenated and has 1 to 15 C atoms or a branched or cyclic alkyl or alkoxy radical that is unsubstituted or halogenated and has 3 to 15 C atoms, in which one or more CH2 groups may each be replaced, independently of one another by
- —C≡C—, —CF2O—, —OCF2—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another,
- one of Y1 and Y2 is H, F or Cl, and the other one of Y1 and Y2 being different from H is F or Cl,
- Y5 is H or CH3, and
- alkyl denotes a straight-chain alkyl radical having 1-6 C atoms.
9 more elements
Dependencies are inferred from the claim text.