Liquid-crystalline medium and liquid-crystal display comprising the same
AssigneeMerck Patent GmbH
InventorAtsutaka Manabe
Life of this patent
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Abstract
The invention relates to a liquid-crystalline medium, preferably having a nematic phase and dielectric anisotropy of 0.5 or more, which comprises one or more compounds of formula Y in which the parameters have the meanings given in the text, to the use thereof in an electro-optical display, particularly in an active-matrix display based on the IPS or FFS effect, to displays of this type which contain a liquid-crystalline medium of this type, and to the use of the compounds of formula Y for the improvement of the transmission and/or response times of a liquid-crystalline medium which comprises one or more additional mesogenic compounds.
Claims19
A liquid-crystalline medium having a dielectric anisotropy (Δε) of 0.5 or more at a temperature of 20° C., which comprises one or more compounds of formula Y
- in which
- n denotes 0 or 1,
- RY1 and RY2 independently of each other denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, or RY1 denotes RY and RY2 denotes XY,
- RY denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, and
- XY denotes F, Cl, fluorinated alkyl, fluorinated alkenyl, fluorinated alkoxy or fluorinated alkenyloxy having 1 to 7 C atoms,
- subject to the proviso that either:
- RY2 denotes XY or
- n denotes 1 and
A liquid-crystalline medium having a dielectric anisotropy (Ac) of 0.5 or more at a temperature of 20° C., which comprises one or more compounds selected from the group of compounds of formulae Y-1 to Y-6:
- in which the parameters RY, RY1, RY2 and XY have the meanings given below:
- RY1 and RY2 independently of each other denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, or RY1 denotes RY and RY2 denotes XY,
- RY denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, and
- XY denotes F, Cl, fluorinated alkyl, fluorinated alkenyl, fluorinated alkoxy or fluorinated alkenyloxy having 1 to 7 C atoms.
A liquid-crystalline medium having a dielectric anisotropy (Ac) of 0.5 or more at a temperature of 20° C., which comprises one or more compounds of formula Y
- in which
- n denotes 0 or 1,
- RY1 and RY2 independently of each other denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, or RY1 denotes RY and RY2 denotes XY,
- RY denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, and
- XY denotes F, Cl, fluorinated alkyl, fluorinated alkenyl, fluorinated alkoxy or fluorinated alkenyloxy having 1 to 7 C atoms,
- subject to the proviso that either:
- RY2 denotes XY or
- n denotes 1 and
Dependencies are inferred from the claim text.