Liquid-Crystal Display Devices Containing Polymerisable Compounds
AssigneeMerck Patent GmbH
InventorsDmitry USHAKOV, Kaja Christina DEING
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Abstract
Liquid-crystal (LC) display devices comprising polymerisable compounds, processes and intermediates for the preparation of the devices and compounds, LC media comprising the compounds, and the use of the polymerisable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type.
Claims22
A liquid crystal (LC) display device, which is a PSA display or a polymer stabilised SA-VA display, and which comprises two substrates, at least one which is transparent to light, an electrode provided on each substrate or two electrodes provided on only one of the substrates, and located between the substrates a layer of an LC medium, wherein the LC medium comprises one or more polymerisable compounds of the following formula I and the polymerisable compounds are polymerised between the substrates of the display:
- wherein the individual radicals, independently of each other, and on each occurrence identically or differently, have the following meanings
- P are a methacrylate group or an acrylate group, wherein both groups P have the same meaning,
- Sp are a single bond or —(CH2)p1—, —O—(CH2)p1—, —O—CO—(CH2)p1—, or —CO—O—(CH2)p1—, wherein p1 is 2, 3, 4, 5 or 6, and, if Sp is —O—(CH2)p1—, —O—CO—(CH2)p1— or —CO—O—(CH2)p1— the O-atom or CO-group, respectively, is linked to the benzene ring,
- L11, L12 are F, CI or OR,
- R is straight-chain or branched alkyl with 1 to 4 C atoms that is optionally fluorinated,
- L13, L14 are F, Cl, —CN or straight chain, branched or cyclic alkyl having 1 to 25 C atoms, wherein one or more non-adjacent CH2-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O— in such a manner that O- and/or S-atoms are not directly connected with each other, and wherein one or more H atoms are each optionally replaced by F or Cl,
- r1, r2 are 0, 1, 2, 3 or 4, wherein r1+r2≥2,
- r3, r4 are 0, 1, 2, 3 or 4, wherein r1+r3≤4 and r2+r4≤4,
- wherein the compounds contain at least group L11 or L12 that is F or Cl, and at least one group L11 or L12 that is OR, and
- with the proviso that the following compounds are excluded
- wherein P, Sp, L11 and L12 are as defined above.
A liquid crystal (LC) display device, which comprises and an LC medium, wherein the LC medium comprises one or more polymerisable compounds of the following formula I:
- wherein the individual radicals, independently of each other, and on each occurrence identically or differently, have the following meanings
- P are a methacrylate group or an acrylate group, wherein both groups P have the same meaning,
- Sp are a single bond or —(CH2)p1—, —O—(CH2)p1—, —O—CO—(CH2)p1—, or —CO—O—(CH2)p1—, wherein p1 is 2, 3, 4, 5 or 6, and, if Sp is —O—(CH2)p1—, —O—CO—(CH2)p1— or —CO—O—(CH2)p1— the O-atom or CO-group, respectively, is linked to the benzene ring,
- L11, L12 are F, Cl or OR,
- R is straight-chain or branched alkyl with 1 to 4 C atoms that is optionally fluorinated,
- L13, L14 are F, Cl, —CN or straight chain, branched or cyclic alkyl having 1 to 25 C atoms, wherein one or more non-adjacent CH2-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O— in such a manner that O- and/or S-atoms are not directly connected with each other, and wherein one or more H atoms are each optionally replaced by F or Cl,
- r1, r2 are 0, 1, 2, 3 or 4, wherein r1+r2≥2,
- r3, r4 are 0, 1, 2, 3 or 4, wherein r1+r3≤4 and r2+r4≤4,
- wherein the compounds contain at least group L11 or L12 that is F or Cl, and at least one group L11 or L12 that is OR, and
- with the proviso that the following compounds are excluded
- wherein P, Sp, L11 and L12 are as defined above.
Dependencies are inferred from the claim text.