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US 8,617,419 B2Granted
Liquid-crystalline medium and liquid-crystal display
AssigneeMerck Patent GmbH
InventorsSayuri Ohgiri, Masahiko Okamura, Yasushi Sugiyama, Hideo Ichinose
Life of this patent
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Abstract
The present invention relates to dielectrically positive, preferably nematic, media comprising one or more polymerisable compounds of formula I in which the parameters have the meaning given in the text, to polymer-stabilized media obtained therefrom, to the use thereof in liquid-crystal displays, and to these displays, in particular PSA-IPS, PSA-FFS and PSA-positive VA displays.
Claims20
A liquid-crystalline medium having positive dielectric anisotropy, comprising
- one or more polymerizable compounds of formula I
- in which
- P11 and P12 are independently from one another a polymerizable group,
- Sp11 and Sp12 are independently from one another a spacer group having from one to 10 C-atoms or a single bond,
- X11 and X12 are independently from one another —O—, —O—CO—, —CO—O—, —O—CO—O— or a single bond,
- L are in each occurrence independently from each other H, F, Cl or alkyl with 1 to 5 C-atoms,
- r and s independently of one another are 0, 1, 2 or 3, and
- t is 0, 1 or 2,
- and
- one or more dielectrically positive compounds of formula II-2j
- in which
- R2 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms,
- X2 denotes halogen, halogenated alkyl or alkoxy having 1 to 3 C atoms or halogenated alkenyl or alkenyloxy having 2 or 3 C atoms, and
- L21 to L28 independently of one another, denote H or F,
- and
- one or more dielectrically positive compounds of formula III-1f-4
- in which
- R3 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms.
15 more elements
A liquid-crystalline medium having positive dielectric anisotropy, comprising
- one or more polymerizable compounds of formula I
- in which
- P11 and P12 are independently from one another a polymerizable group,
- Sp11 and Sp12 are independently from one another a spacer group having from one to 10 C-atoms or a single bond,
- X11 and X12 are independently from one another —O—, —O—CO—, —CO—O—, —O—CO—O— or a single bond,
- L are in each occurrence independently from each other H, F, Cl or alkyl with 1 to 5 C-atoms,
- r and s independently of one another are 0, 1, 2 or 3, and
- t is 0, 1 or 2,
- and
- one or more dielectrically positive compounds of formula II-2j
- in which
- R2 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms,
- X2 denotes halogen, halogenated alkyl or alkoxy having 1 to 3 C atoms or halogenated alkenyl or alkenyloxy having 2 or 3 C atoms, and
- L21 to L28 independently of one another, denote H or F,
- and
- one or more dielectrically positive compounds of formula III-1f-4
- in which
- R3 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms
- and
- one or more dielectrically neutral compounds of formula IV
- in which
- R41 and R42 independently of one another, denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms,
- independently of one another and, if
- occurs twice, these also independently of one another, denote
- Z41 and Z42 independently of one another and, if Z41 occurs twice, these also independently of one another, denote —CH2CH2—, —COO—, trans-CH═CH—, trans-CF═CF—, —CH2O—, —CF2O—, —C≡C— or a single bond, and
- p denotes 0, 1 or 2.
23 more elements
A liquid-crystalline medium having positive dielectric anisotropy, comprising
- one or more polymerizable compounds of formula I
- in which
- P11 and P12 are independently from one another a polymerizable group,
- Sp11 and Sp12 are independently from one another a spacer group having from one to 10 C-atoms or a single bond,
- X11 and X12 are independently from one another —O—, —O—CO—, —CO—O—, —O—CO—O— or a single bond,
- L are in each occurrence independently from each other H, F, Cl or alkyl with 1 to 5 C-atoms,
- r and s independently of one another are 0, 1, 2 or 3, and
- t is 0, 1 or 2,
- and
- one or more dielectrically positive compounds of formula II-2j
- in which
- R2 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms,
- X2 denotes halogen, halogenated alkyl or alkoxy having 1 to 3 C atoms or halogenated alkenyl or alkenyloxy having 2 or 3 C atoms, and
- L21 to L28 independently of one another, denote H or F,
- and
- one or more dielectrically positive compounds of formula III-1f-4
- in which
- R3 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy haying 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl haying 2 to 7 C atoms
- and
- one or more dielectrically neutral compounds of formula V
- in which
- R51 and R52 independently of one another, denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy haying 1 to 7 C atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl haying 2 to 7 C atoms,
- and, if it occurs twice, independently of one another on each occurrence, denotes
- Z51 and Z52 independently of one another and, if Z51 occurs twice, these also independently of one another, denote —CH2CH2—, —COO—, trans-CH═CH—, trans-CF═CF—, —CH2O—, —CF2O— or a single bond, and
- r denotes 0, 1 or 2.
22 more elements
Dependencies are inferred from the claim text.