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US 2023/0340328 A1Published application
Liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsSven Christian LAUT, Hee-Kyu LEE, Jing WANG
Life of this patent
Estimating the term…
Abstract
A liquid-crystalline (LC) media having positive dielectric anisotropy and tliquid-crystal displays (LCDs) containing these media, especially to displays addressed by an active matrix and in particular to energy efficient LC displays of the TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, SA-HB-FFS, SA-XB-FFS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA type.
Claims18
A liquid-crystalline medium, comprising one or more compounds of Formula I
- in which the individual radicals, on each occurrence identically or differently, and each, independently of one another, have the following meaning:
- denotes
- R1 denotes a H atom, an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 to 12 C atoms in which one or more CH2 groups are optionally substituted by -C=-C-
- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more H atoms may be replaced by a halogen atom,
- Y0 denotes a H atom or CH3,
- X1 denotes —CN, -SCN, a halogen atom or an alkyl or an alkoxy group having 1 to 3 C atoms or an alkenyl or an alkenyloxy group having 2 or 3 C atoms in which one or more H atoms are replaced by a halogen atom, and
- L1 to L4 denote H or F;
- and one or more compounds selected from L1 and L2,
- in which the individual radicals, on each occurrence identically or differently, and each, independently of one another, have the following meaning:
- R0 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH2 groups are optionally substituted by -C=C-, —CF2O—, —OCF2-, -CH=CH-,
- O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom,
- R2 denotes an alkyl group having 1 to 6 C atoms, in which one or more CH2 groups are optionally substituted by -C=C-, —CF2O—, —OCF2-,
- O—,CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom;
- Y1 and Y2 denote H, F or CI,
- Y0 denotes H or CH3;
- in which the individual radicals, on each occurrence identically or differently, and each, independently of one another, have the following meaning:
- R0 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH2 groups are optionally substituted by -C=C-, —CF2O—, —OCF2-, —CH═CH—,
- O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom,
- X2 denotes a F atom or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms are replaced by a F atom,
- Y1 and Y2 denote H, F or Cl,
- Y0 denotes H or CH3,
- wherein the liquid crystal medium has positive dielectric anisotropy.
19 more elements
The liquid-crystalline medium according to further comprising one or more compounds selected from compounds of Formulae Y, B, XII, XXXI and XXXIII
- in which the individual radicals, on each occurrence identically or differently, and each, independently of one another, have the following meanings:
- denotes
- denotes
- denotes
- R1, R2, R3 denotes a H atom, an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 to 12 C atoms in which one or more CH2 groups are optionally substituted by -C=C-, —CF2O—, -OCF2-, -CH=CH-,
- O—,CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more H atoms may be replaced by a halogen atom,
- Zx, Zy denote —CH2CH2—, —CH═CH—, —CF2O—, -OCF2-, —CH2O—, -OCH2-, —C O—O—, —O—CO—, —C2F4—, —CF═CF—, —CH═CH—CH2O—, or a single bond,
- Zz denotes CH2O or a single bond,
- Y1 denotes O or S,
- L1-4 denoted H, F or Cl,
- x, y denote 0, 1 or 2, with x+y ≤3,
- z denote 0 or 1,
- in which
- R″ denotes C1-6-alkyl, C1-6-alkoxy or C2-6-alkenyl, and
- “alkenyl” denotes C2-6-alkenyl,
- in which
- R1 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH2 groups are optionally substituted by —C═C—, —CF2O—, -OCF2-, —CH═CH—,
- O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom,
- R2 denotes an alkyl group having 1 to 6 C atoms, in which one or more CH2 groups are optionally substituted by —C═C—, —CF2O—, -OCF2-, CH═CH—,
- O—,CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom;
- L denotes H, F or Cl.
18 more elements
Dependencies are inferred from the claim text.