US 12,258,509 B2
Optical component
Izumi Saito, Darmstadt (DE); Owain Llyr Parri, Feltham (GB); Andreas Taugerbeck, Darmstadt (DE); Carsten Fritzsch, Darmstadt (DE); and Dagmar Klass, Darmstadt (DE)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Appl. No. 18/014,518
Filed by Merck Patent GmbH, Darmstadt (DE)
PCT Filed Jul. 6, 2021, PCT No. PCT/EP2021/068574
§ 371(c)(1), (2) Date Jan. 5, 2023,
PCT Pub. No. WO2022/008474, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 20184700 (EP), filed on Jul. 8, 2020.
Prior Publication US 2023/0313043 A1, Oct. 5, 2023
Int. Cl. G02F 1/1333 (2006.01); C09K 19/12 (2006.01); C09K 19/16 (2006.01); C09K 19/18 (2006.01); C09K 19/30 (2006.01); C09K 19/32 (2006.01); C09K 19/34 (2006.01); G02F 1/01 (2006.01); G02F 1/1334 (2006.01); G02F 1/1343 (2006.01); G02F 1/1362 (2006.01); G02F 1/137 (2006.01); G02F 1/1335 (2006.01); G02F 1/1341 (2006.01)
CPC C09K 19/12 (2013.01) [C09K 19/16 (2013.01); C09K 19/18 (2013.01); C09K 19/30 (2013.01); C09K 19/3003 (2013.01); C09K 19/3059 (2013.01); C09K 19/322 (2013.01); C09K 19/3491 (2013.01); G02F 1/0136 (2013.01); G02F 1/13345 (2021.01); G02F 1/134336 (2013.01); G02F 1/136277 (2013.01); G02F 1/137 (2013.01); C09K 2019/122 (2013.01); C09K 2019/123 (2013.01); C09K 2019/161 (2013.01); C09K 2019/181 (2013.01); C09K 2019/183 (2013.01); C09K 2019/188 (2013.01); C09K 2019/3016 (2013.01); C09K 2019/3019 (2013.01); C09K 2019/3063 (2013.01); G02F 1/133302 (2021.01); G02F 1/133354 (2021.01); G02F 1/133553 (2013.01); G02F 1/1341 (2013.01); G02F 1/13439 (2013.01); G02F 2202/06 (2013.01); G02F 2203/01 (2013.01); G02F 2203/02 (2013.01); G02F 2203/11 (2013.01); G02F 2203/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical component (100) operable in the infrared region of the electromagnetic spectrum comprising:
a liquid crystal medium (140) sandwiched between a first substrate (110) and a second substrate (160) facing each other, and
first and second electrodes (120, 150) for supplying an electric potential across said liquid crystal medium to drive liquid crystals in a predetermined configuration,
wherein said liquid crystal medium comprises:
one or more compounds selected from formulae I, II, and III

OG Complex Work Unit Chemistry
in which
R1 denotes H, or a straight chain alkyl having 1 to 12 C atoms, a branched alkyl having 3 to 12 C atoms, a straight chain alkenyl having 2 to 15 C atoms, or a branched alkenyl having 3 to 15 C atoms, in which one or more CH2-groups may each be replaced by

OG Complex Work Unit Chemistry
n is 0, 1 or 2,

OG Complex Work Unit Chemistry
on each occurrence, independently of one another, denote

OG Complex Work Unit Chemistry
in which RL, on each occurrence, identically or differently, denotes H or alkyl having 1 to 6 C atoms,
and wherein

OG Complex Work Unit Chemistry
alternatively denotes

OG Complex Work Unit Chemistry
R2 denotes H, or a straight chain having 1 to 12 C atoms, a branched alkyl having 3 to 12 C atoms, a straight chain having 1 to 12 C atoms, or a branched alkenyl having 3 to 15 C atoms, in which one or more CH2-groups may each be replaced by

OG Complex Work Unit Chemistry
Z21 denotes trans-CH═CH—, trans-CF═CF— or —C≡C—, and

OG Complex Work Unit Chemistry
independently of one another, denote

OG Complex Work Unit Chemistry
in which RL, on each occurrence, identically or differently, denotes H or alkyl having 1 to 6 C atoms,
and wherein
R3 denotes H, a straight chain alkyl having 1 to 12 C, a branched alkyl having 3 to 12 C atoms, a straight chain alkenyl having 2 to 15 C atoms, or a branched alkenyl having 3 to 15 C atoms, in which one or more CH2-groups may each be replaced by

OG Complex Work Unit Chemistry
one of Z31 and Z32, denotes trans-CH═CH—, trans-CF═CF— or —C≡C— and the other one, independently thereof, denotes —C≡C—, trans-CH═CH—, trans-CF═CF— or a single bond;

OG Complex Work Unit Chemistry
independently of one another, denote

OG Complex Work Unit Chemistry
in which RL, on each occurrence, identically or differently, denotes H or alkyl having 1 to 6 C atoms,
and wherein

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alternatively denotes

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one or more compounds of formula RO

OG Complex Work Unit Chemistry
in which
RRO denotes straight chain having 1 to 12 C atoms, a branched alkyl having 3 to 12 C atoms, a straight chain alkenyl having 2 to 12 C atoms, or a branched alkenyl having 3 to 12 C atoms, in each of which one or more CH2-groups may each be replaced by

OG Complex Work Unit Chemistry
ZT1, ZT2 identically or differently, denote —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C≡C— or a single bond,
X1, X2,
X3 and X4 identically or differently, denote H, Cl, F or CH3,
t is 0 or 1, and

OG Complex Work Unit Chemistry
denote a radical selected from the following groups:
a) the group consisting of 1,4-phenylene, 1,4-naphthylene, and 2,6-naphthylene, in which one or two CH groups may each be replaced by N and in which one or more H atoms may each be replaced by L,
b) the group consisting of thiophene-2,5-diyl, thieno[3,2-b]thiophene-2,5-diyl, selenophene-2,5-diyl, furan-2,5-diyl, each of which is optionally mono- or polysubstituted by L,
L on each occurrence, identically or differently, denotes F, Cl, a straight-chain alkyl or alkoxy, in each case optionally fluorinated, having 1 to 12 C atoms, a branched alkyl or alkoxy having 3 to 12 C atoms, a straight-chain alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy, or alkoxycarbonyloxy having 2 to 12 C atoms, or branched alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy, or alkoxycarbonyloxy having 2 4 to 12 C atoms;
wherein
said medium contains one or more compounds of the formula I in a total concentration of 30% or more, and
said medium contains one or more compounds of formula III in a total concentration of 2% to 30%.