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US 8,524,117 B2Granted
Liquid crystalline medium
AssigneeMerck Patent GmbH
InventorsNorihiko Tanaka, Makoto Murakami, Shinji Nakajima
Life of this patent
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Abstract
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least one compound of the formula I and at least one compound of the formula II in which R1, R2, R3, R4, ring A, Z1, Z2 and m are as defined in Claim 1, and to the use thereof for an active-matrix display based on the ECB, VA, PS-VA, FFS, PALO or IPS effect.
Claims23
A liquid crystalline medium containing at least one compound of formula I,
- and at least one compound of formula II,
- and containing >30% by weight of at least one compound of the following formulae CC-3-V, CC-5-V, CC-4-V and/or CC-3-V1
- wherein
- R1 to R4 are each independently alkyl or alkoxy with 1 to 8 C atoms, wherein one or more CH2-groups are optionally replaced by —CH═CH—, —CF2O or —O— in a way that —O— atoms are not linked directly to one another,
- X1 and X2 are each independently F, Cl or CF3,
- Z1 and Z2 are each independently a single bond, —CH2CH2—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, or —COO—, and
- m is 0 or 1.
4 more elements
A liquid crystalline medium containing at least one compound of formula I,
- and at least one compound of formula II,
- and containing >30% by weight of at least one compound of the following formulae CC-3-V, CC-5-V, CC-4-V and/or CC-3-V1
- wherein
- R1 to R4 are each independently alkyl or alkoxy with 1 to 8 C atoms, wherein one or more CH2-groups are optionally replaced by —CH═CH—, —CF2O or —O— in a way that —O— atoms are not linked directly to one another,
- X1 and X2 are each independently F, Cl or CF3,
- Z1 and Z2 are each independently a single bond, —CH2CH2—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, or —COO—, and
- m is 1.
4 more elements
Dependencies are inferred from the claim text.