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US 11,473,014 B2Granted
Liquid-crystal lens
AssigneeMerck Patent GmbH
InventorsArnold (Jer-Wei) Chang, Roger (Chih-chieh) Chang, Ray (Kuang-Ting) Chou
Life of this patent
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Abstract
A LC lens and a liquid-crystal medium used in said LC lens, wherein the medium contains one or more compounds of each of formulae I and II
Claims22
A liquid-crystal lens comprising an electrode on a substrate and a liquid-crystal medium, wherein the liquid-crystal medium comprises
- one or more compounds of formula I-1 present at a concentration of 12-18%, one or more compounds of formula I-2 present at a concentration of 3-7% and one or more compounds of formula I-3 present at a concentration of 25-45%,
- in which
- R11 and R12 identically or differently, denote H, alkyl or alkoxy having 1 to 12 C atoms, or alkenyl, alkenyloxy or alkoxyalkyl having 2 to 12 C atoms, in which one or more CH2-groups may be replaced by
- and in which one or more H atoms may be replaced by fluorine,
- Z1 denotes —CH2CH2— or a single bond, and
- L11, L12, L13 each, independently of one another, denote H or F;
- and
- 10% to 30% by weight of one or more compounds of formula IIZ
- in which
- R2 denotes H, alkyl or alkoxy having 1 to 12 C atoms, or alkenyl, alkenyloxy or alkoxyalkyl having 2 to 12 C atoms, in which one or more CH2-groups may be replaced by
- and in which one or more H atoms may be replaced by fluorine,
- X2 denotes F, Cl, CF3, OCF3, CN or NCS,
- L21 denotes H or F,
- L2 denotes H or alkyl having 1 to 6 C atoms, and
- m is 0 or 1;
- and
- one or more compounds of formula III
- in which
- R31 and R32 identically or differently, denote alkyl having 1 to 20 C atoms, which is straight chain or alkyl having 3 to 20 C atoms, which is branched, which is non-substituted, mono- or poly-substituted by F, Cl or CN, and in which one or more CH2 groups are optionally replaced, in each case independently from one another, by —O—, —S—, —CO—, —COO—, —OCO—, —OCO—O—, —S—CO—, —CO—S—, —CH═CH— or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another,
- independently of each other, denote
- Z31 and Z32 on each occurrence, identically or differently, denote —CH2CH2—, —CF2CF2—, —CF2CH2—, —COO—, trans- —CH═CH—, trans- —CF═CF—, —CH2O—, —CF2O—, —C≡C— or a single bond, and
- p is 0, 1 or 2;
- and
- 1% to 10% by weight of one or more compounds of formula VI
- in which
- denotes
- R6 denotes H, alkyl or alkoxy having 1 to 12 C atoms, or alkenyl, alkenyloxy or alkoxyalkyl having 2 to 12 C atoms, in which one or more CH2-groups may be replaced by
- and in all of which one or more H atoms may be replaced by fluorine,
- X6 denotes CN, F, CF3 or OCF3 and
- Y61 and Y62 identically or differently, denote H, Cl or F;
- and wherein the medium has a birefringence of 0.24 or more, and a dielectric anisotropy of 5 to 15.
28 more elements
A liquid-crystal medium comprising
- one or more compounds of formula I-1, one or more compounds of formula I-2 and one or more compounds of formula I-3, wherein the compounds of formulae I-1, I-2 and I-3 are present collectively at 40% to 90,
- in which
- R11 and R12 identically or differently, denote H, alkyl or alkoxy having 1 to 12 C atoms, or alkenyl, alkenyloxy or alkoxyalkyl having 2 to 12 C atoms, in which one or more CH2-groups may be replaced by
- and in which one or more H atoms may be replaced by fluorine,
- Z1 denotes —CH2CH2— or a single bond, and
- L11, L12, L13 each, independently of one another, denote H or F;
- and
- 10% to 40% by weight of one or more compounds of formula IIZ
- in which
- R2 denotes H, alkyl or alkoxy having 1 to 12 C atoms, or alkenyl, alkenyloxy or alkoxyalkyl having 2 to 12 C atoms, in which one or more CH2-groups may be replaced by
- and in which one or more H atoms may be replaced by fluorine,
- X2 denotes F, Cl, CF3, OCF3, CN or NCS,
- L21 denotes H or F,
- L2 denotes H or alkyl having 1 to 6 C atoms, and
- m is 0 or 1;
- and
- one or more compounds of formula III
- in which
- R31, R32 identically or differently, denote alkyl having 1 to 20 C atoms, which is straight chain or alkyl having 1 to 20 C atoms, which is branched, which is non-substituted, mono- or poly-substituted by F, Cl or CN, and in which one or more CH2 groups are optionally replaced, in each case independently from one another, by —O—, —S—, —CO—, —COO—, —OCO—, —OCO—O—, —S—CO—, —CO—S—, —CH═CH— or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another,
- independently of each other, denote
- Z31 and Z32 on each occurrence, identically or differently, denote —CH2CH2—, —CF2CF2—, —CF2CH2—, —COO—, trans-CH═CH—, trans-CF═CF—, —CH2O—, —CF2O—, —C≡C— or a single bond, and
- p is 0, 1 or 2;
- and/or
- 1% to 10% by weight of one or more compounds of formula VI
- in which
- denotes
- R6 denotes H, alkyl or alkoxy having 1 to 12 C atoms, or alkenyl, alkenyloxy or alkoxyalkyl having 2 to 12 C atoms, in which one or more CH2-groups may be replaced by
- and in all of which one or more H atoms may be replaced by fluorine,
- X6 denotes CN, F, CF3 or OCF3 and
- Y61, Y62 identically or differently, denote H, Cl or F;
- and wherein the medium has a birefringence of 0.24 or more, and a dielectric anisotropy of 5 to 15.
28 more elements
Dependencies are inferred from the claim text.