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US 7,803,434 B2Granted
Liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsAkihiro Kojima, Fumio Shimano, Makoto Murakami, Jeong Hee Sung
Life of this patent
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Abstract
Disclosed is a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least one compound of formula I and at least one compound of formula I*, and their use in an electro-optical display.
Claims15
A liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least one compound of formula I
- and at least one compound of formula I*,
- wherein
- R1, R2, R1*
- and R2* are, each independently, alkyl or alkoxy with 1 to 8 C atoms, in which one or more CH2-groups are optionally replaced by —CH═CH—,
- are, each independently,
- but at least one of the rings A, B and C is
- L1, L2, L3 and L4 are, each independently, Cl, F or CF3, and
- s is 0 or 1.
5 more elements
Dependencies are inferred from the claim text.