Liquid crystalline medium and liquid crystal display
AssigneeMerck Patent GmbH
InventorsAtsutaka Manabe, Elena Kress, Volker Reiffenrath
Life of this patent
Estimating the term…
Abstract
Liquid crystalline media comprising a dielectrically positive component, component A, containing dielectrically positive compounds, comprising one or more compounds of formula I and one or more compounds of formula II 1 and one or more dielectrically neutral compounds of formula IVb 2 wherein the parameters have the meaning defined therein; and wherein two of the 6-membered rings in formula IVb may optionally be linked by an group selected from —CH2—CH2—, —CF2—CF2—, —CF2—O—, —O—CF2— and —CO—O— are sutiable for use in liquid crystal displays, especially active matrix displays.
Claims13
A liquid crystal medium comprising:
- a dielectrically positive component, component A, containing dielectrically positive compounds, comprising one or more compounds of formula I and one or more compounds of formula II
- 60
- wherein
- R1 and R2, independently of each other, are alkyl having 1 to 7 C-atoms, alkoxy having 1 to 7 C-atoms, fluorinated alkyl having 1 to 7 C-atoms, fluorinated alkoxy having 1 to 7 C-atoms, alkenyl having 2 to 7 C-atoms, alkenyloxy having 2 to 7 C-atoms, alkoxyalkyl having 2 to 7 C-atoms or fluorinated alkenyl having 2 to 7 C-atoms, and
- X1 and X2, independently of each other, are F, Cl, fluorinated alkyl having 1 to 4 C-atoms, or fluorinated alkoxy having 1 to 4 C-atoms,
- wherein, optionally, two of the 6-membered rings in formula I may be linked by a group selected from —CH2—CH2—, —CF2, CF2—, —CF2—O—, —O—CF2— and —CO—O—;
- and
- a dielectrically neutral component, component B containing dielectrically positive compounds, comprising one or more compounds of formula IVb
- 61
- wherein
- R4′ is alkyl having 1 to 7 C-atoms, alkoxy having 1 to 7 C-atoms, fluorinated akyl having 1 to 7 C-atoms, fluorinated alkoxy having 1 to 7 C-atoms, alkenyl having 2 to 7 C-atoms, alkenyloxy having 2 to 7 C-atoms, alkoxyalkyl, having 2 to 7 C-atoms, or fluorinated alkenyl having 2 to 7 C-atoms, and
- X4 is or F or Cl,
- wherein, optionally, two of the 6-membered rings in formula IVb may be linked by a group selected from —CH2—CH2—, —CF2—CF2—, —CF2—O—, —O—CF2— and —CO—O—.
Dependencies are inferred from the claim text.