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US 7,351,453 B2Granted
Liquid crystal medium
AssigneeMerck Patent GmbH
InventorsHideo Ichinose, Shinji Nakajima, Takanori Takeda, Masako Nakamura, Yoshito Hashimoto, Toshihiro Matsumoto, Tsuyoshi Okazaki
Life of this patent
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Abstract
Liquid crystal (LC) media based on a mixture of polar compounds having negative dielectric anisotropy, their use in electro-optical displays, especially those having active matrix addressing based on the ECB (electrically controlled birefringence) or VA (vertically aligned) mode or similar modes, and LC displays of these types, are described.
Claims18
A liquid crystal medium comprising, by weight:
- 5 to 27% of one or more compounds of formula I,
- 2 to 45% of one or more compounds of formula II,
- 12 to 23% of one or more compounds of formula III,
- 5 to 10% of one or more compounds of formula IV,
- 18 to 28% of one or more compounds of formula V,
- 0 to 12% of one or more compounds of formula VI,
- 0 to 14% of one or more compounds of formula VII,
- 0 to 18% of one or more compounds of formula VIII,
- in which
- R1 and R4 are independently of each other methyl, ethyl, n-propyl, n-butyl, n-pentyl or n-hexyl, R4 can also be methoxy,
- R2 is methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, methoxy, ethoxy, n-propoxy, n-butoxy or n-pentoxy,
- R3 is vinyl or 1E-propenyl.
9 more elements
Dependencies are inferred from the claim text.