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US 9,005,720 B2Granted
Liquid-crystal display
AssigneeMerck Patent GmbH
InventorsAchim Goetz, Melanie Klasen-Memmer, Stephan Derow, Sabine Schoen, Peter Best
Life of this patent
Estimating the term…
Abstract
Disclosed are liquid-crystal (LC) media for use in LC displays of the PS (polymer stabilized) or PSA (polymer sustained alignment) type which contain a liquid-crystal (LC) mixture that contains one or more compounds of formula I
Claims45
A polymer stabilized (PS) or polymer sustained alignment (PSA) liquid-crystal display, comprising a liquid-crystal mixture comprising:
- (a) one or more compounds of formula I1:
- in which
- alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1-12 C atoms;
- (b) one or more polymerizable compounds of formula I*
- Ra—B1—(Zb—B2)m—Rb I*
- in which
- Ra and Rb each, independently of one another, denote P, P-Sp-, H, halogen, SF5, NO2, a carbon group or hydrocarbon group, where at least one of the radicals Ra and Rb denotes or contains a group P or P-Sp-,
- P on each occurrence, identically or differently, denotes CH2═CW1—COO—, CH2═CH—O—, (CH2═CH)2CH—OCO—, (CH2═CH)2CH—O—,
- W1 denotes H, F, Cl, CN, CF3, phenyl or alkyl having 1 to 5 C atoms,
- W2 denotes H or alkyl having 1 to 5 C atoms,
- k1 denotes 0 or 1,
- Sp on each occurrence, identically or differently, denotes a spacer group or a single bond,
- B1 and B2 each, independently of one another, denote an aromatic, hetero aromatic, alicyclic or heterocyclic group, which may also contain fused rings, and which is optionally mono- or polysubstituted by L,
- L denotes P-Sp-, H, OH, CH2OH, halogen, SF5, NO2, a carbon group or hydrocarbon group,
- Zb on each occurrence, identically or differently, denotes —O, S, CO, CO—O—, —OCO—, —O—CO—O—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —(CH2)n1—, —CF2CH2—, —CH2CF2—, —(CF2)n1—, —CH═CH—, —CF═CF—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH—, CR0R00 or a single bond,
- R0 and R00 each, independently of one another, denote H or alkyl having 1 to 12 C atoms,
- m denotes 0, and
- n1 denotes 1, 2, 3 or 4,
- (c) one or more compounds selected from formulae CY and PY:
- in which
- a denotes 1 or 2,
- b denotes 0 or 1,
- R1 and R2 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another,
- Zx and Zy each, independently of one another, denote —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —CH═CHCH2O—, or a single bond, and
- L1-4 each, independently of one another, denote F, Cl, OCF3, CF3, CH3, CH2F, or CHF2;
- (d) one or more compounds selected from formulae ZK and DK:
- in which
- R3 and R4 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and
- Zy denotes —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2, —COO—, —OCO—, —C2F4—, —CF═CF—, —CH═CHCH2O— or a single bond, and
- R5 and R6 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another;
- and
- (e) one or more compounds selected from formula T:
- in which
- R5 and R6 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and
- each, independently of one another, denote
- L5 denotes F or Cl, and
- L6 denotes F, Cl, OCF3, CF3, CH3, CH2F or CHF2;
- wherein said medium does not contain chiral compounds.
35 more elements
A liquid-crystal medium comprising:
- a polymerizable component A) comprising one or more polymerizable compounds,
- or
- a polymer obtainable by polymerization of a polymerizable component A) comprising one or more polymerizable compounds,
- and
- a liquid-crystalline component B) comprising a liquid-crystal (LC) mixture comprising:
- (a) one or more compounds of formula I1:
- in which
- alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1-12 C atoms;
- (b) one or more compounds selected from formulae CY and PY:
- in which
- a denotes 1 or 2,
- b denotes 0 or 1,
- R1 and R2 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another,
- Zx and Zy each, independently of one another, denote —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —CH═CHCH2O—, or a single bond, and
- L1-4 each, independently of one another, denote F, Cl, OCF3, CF3, CH3, CH2F, or CHF2;
- (c) one or more compounds selected from formulae ZK and DK:
- in which
- R3 and R4 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and
- Zy denotes —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —CH═CHCH2O— or a single bond, and
- R5 and R6 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another;
- and
- (d) one or more compounds selected from formula T:
- in which
- R5 and R6 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and
- each, independently of one another, denote
- L5 denotes F or Cl, and
- L6 denotes F, Cl, OCF3, CF3, CH3, CH2F or CHF2;
- and
- wherein polymerizable component A) comprises one or more polymerizable compounds of formula I*
- Ra—B1—(Zb—B2)m—Rb I*
- in which
- Ra and Rb each, independently of one another, denote P, P-Sp-, H, halogen, SF5, NO2, a carbon group or hydrocarbon group, where at least one of the radicals Ra and Rb denotes or contains a group P or P-Sp-,
- P on each occurrence, identically or differently, denotes CH2═CW1—COO—, CH2═CH—O—, (CH2═CH)2CH—OCO—, (CH2═CH)2CH—O—,
- W1 denotes H, F, Cl, CN, CF3, phenyl or alkyl having 1 to 5 C atoms,
- W2 denotes H or alkyl having 1 to 5 C atoms,
- k1 denotes 0 or 1,
- Sp on each occurrence, identically or differently, denotes a spacer group or a single bond,
- B1 and B2 each, independently of one another, denote an aromatic, hetero aromatic, alicyclic or heterocyclic group, which may also contain fused rings, and which may also be mono- or polysubstituted by L,
- L denotes P-Sp-, H, OH, CH2OH, halogen, SF5, NO2, a carbon group or hydrocarbon group,
- Zb on each occurrence, identically or differently, denotes —O—, —S—, —CO—, —CO—O—, —OCO—, —O—CO—O—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —(CH2)n1—, —CF2CH2—, —CH2CF2—, —(CF2)n1—, —CH═CH—, —CF═CF—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH—, CR0R00 or a single bond,
- R0 and R00 each, independently of one another, denote H or alkyl having 1 to 12 C atoms,
- m denotes 0, 1, 2, 3 or 4, and
- n1 denotes 1, 2, 3 or 4, and
- wherein said medium does not contain chiral compounds.
41 more elements
A liquid-crystal display containing an liquid crystal cell containing two substrates, where at least one substrate is transparent to light and at least one substrate has an electrode layer, and a layer, located between the substrates, of a liquid-crystal medium comprising a polymerized component and a low-molecular-weight component, where the polymerized component is obtainable by polymerization of one or more polymerizable compounds in the liquid crystal medium between the substrates of the liquid-crystal cell with application of an electrical voltage, and where the low-molecular-weight component is a liquid-crystal mixture comprising:
- (a) one or more compounds of formula I1:
- in which
- alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1-12 C atoms;
- (b) one or more compounds selected from formulae CY and PY:
- in which
- a denotes 1 or 2,
- b denotes 0 or 1,
- R1 and R2 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another,
- Zx and Zy each, independently of one another, denote —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —CH═CHCH2O—, or a single bond, and
- L1-4 each, independently of one another, denote F, Cl, OCF3, CF3, CH3, CH2F, or CHF2;
- (c) one or more compounds selected from formulae ZK and DK:
- in which
- R3 and R4 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and
- Zy denotes —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —CH═CHCH2O— or a single bond, and
- R5 and R6 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another;
- and
- (d) one or more compounds selected from formula T:
- in which
- R5 and R6 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and
- each, independently of one another, denote
- L5 denotes F or Cl, and
- L6 denotes F, Cl, OCF3, CF3, CH3, CH2F or CHF2.
19 more elements
Dependencies are inferred from the claim text.