Nematic liquid crystal mixtures and a matrix liquid crystal display
AssigneeMerck Patent GmbH
InventorsBernhard Rieger, Volker Reiffenrath, Reinhard Hittich
Life of this patent
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Abstract
A nematic liquid crystal mixture having a positive dielectric anisotropy Δ∈ of at least +4 and a birefringence Δn of at least 0.12, characterized in that the mixtures comprises one or more components having the core structure wherein L1, L2, Y and Z are each independently of one another H or F, one of Q1 and Q2 is 1,4-phenylene, 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other residue Q1 or Q2 is —CH2CH2—, —CH2CH2CH2CH2— or—if at least one of L1, L2, Y and Z denotes F—also a single bond, whereby this core structure can be optionally further fluorinated in the benzene rings.
Claims26
A compound having a core structure
- wherein at least
- one of L1, L2, Y and Z is F, the others are each independently of one another H or F, and
- one of Q1 and Q2 is 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other Q1 and Q2 is a single bond,
- wherein this core structure is optionally further fluorinated in the benzene rings, excluding the further fluorination of Q1 and/or Q2.
A compound of formula I
- wherein
- at least one of L1, L2, Y and Z is F, the others are each independently of one another H or F,
- one of Q1 and Q2 is 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other Q1 and Q2 is a single bond,
- R is alkyl or alkoxy of up to 10 carbon atoms,
- r is 0 or 1,
- X is F, and
- wherein this core structure is optionally further fluorinated in the benzene rings.
A compound of formula I
- wherein
- at least one of L1, L2, Y and Z is F, the others are each independently of one another H or F,
- one of Q1 and Q2 is 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other Q1 and Q2 is a single bond,
- R is alkyl or alkoxy of up to 10 carbon atoms,
- r is 0 or 1,
- X is Cl, and
- wherein this core structure is optionally further fluorinated in the benzene rings.
A compound of formula I
- wherein
- L1 is F
- L2, Y and Z are each independently of one another H or F,
- one of Q1 and Q2 is 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other Q1 and Q2 is a single bond,
- R is alkyl or alkoxy of up to 10 carbon atoms,
- r is 0 or 1,
- X is F or Cl, and
- wherein this core structure is optionally further fluorinated in the benzene rings.
A compound of formula I
- wherein
- L1 is F
- L2 is H
- Y and Z are each independently of one another H or F,
- one of Q1 and Q2 is 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other Q1 and Q2 is a single bond,
- R is alkyl or alkoxy of up to 10 carbon atoms,
- r is 0 or 1,
- X is F or Cl, and
- wherein this core structure is optionally further fluorinated in the benzene rings.
A compound of formula I
- wherein
- at least one of L, L2, Y and Z is F, the others are each independently of one another H or F,
- one of Q1 and Q2 is 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other Q1 and Q2 is a single bond,
- R is alkyl or alkoxy of up to 10 carbon atoms,
- r is 0 or 1,
- X is OCF3, and
- wherein this core structure is optionally further fluorinated in the benzene rings.
A compound of formula I
- wherein
- L1 is F
- L2, Y and Z are each independently of one another H or F,
- one of Q1 and Q2 is 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other Q1 and Q2 is a single bond,
- R is alkyl or alkoxy of up to 10 carbon atoms,
- r is 0 or 1,
- X is OCF3, and
- wherein this core structure is optionally further fluorinated in the benzene rings.
A compound of formula I
- wherein
- L1 is F
- L2 is H
- Y and Z are each independently of one another H or F,
- one of Q1 and Q2 is 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other Q1 and Q2 is a single bond,
- R is alkyl or alkoxy of up to 10 carbon atoms,
- r is 0 or 1,
- X is OCF3, and
- wherein this core structure is optionally further fluorinated in the benzene rings.
Dependencies are inferred from the claim text.