Liquid crystal compositions comprising mesogenic compounds, and devices for high-frequency thechnology

Patent metadata

Field	Value
Publication number	US-10023798-B2
Application number	US-201615198032-A
Country	US
Kind code	B2
Filing date	Jun 30, 2016
Priority date	Aug 19, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Disclosed are novel mesogenic compounds, liquid crystal compositions (liquid-crystalline media) comprising them and suitable for high-frequency technology, and high-frequency devices using them, such as phase shifters, antennas, tunable filters, switching devices, e.g. operated in the microwave region, to a process for preparing the compositions. The liquid crystal compositions have high optical anisotropy, a positive dielectric anisotropy and a wide temperature range of nematic phases.

First claim

What is claimed is:

1. A microwave antenna array comprising a liquid-crystalline medium comprising:
at least one compound of the formula I and
at least one compound of the formula II
or
at least one compound of the formula I and
at least one compound of the formula III
or
at least one compound of the formula II and
at least one compound of the formula III
or
at least one compound of the formula I and
at least one compound of the formula II and
at least one compound of the formula III

in which
R 11 , independently of one another, denotes H, an alkyl or an alkoxy having 1 to 17 carbon atoms, or an alkenyl, an alkenoxy or an alkoxy-alkyl having 2 to 15 carbon atoms,

independently of one another, denote

in which
R 21 , independently of one another, denotes H, an alkyl or an alkoxy having 1 to 17 carbon atoms, or an alkenyl, an alkenoxy or an alkoxy-alkyl having 2 to 15 carbon atoms,
X 21 , independently of one another, denotes —NCS or —OSO 2 CF 3 ,

independently of one another, denote

in which
X 31 , independently of one another, denotes —NCS or —OSO 2 CF 3 ,
R 31 , independently of one another, denote H, an alkyl or an alkoxy having 1 to 17 carbon atoms, or an alkenyl, an alkenoxy or an alkoxy-alkyl having 2 to 15 carbon atoms,

independently of one another, denote

2. The microwave antenna array according to claim 1 , wherein said medium comprises one or more compounds of the formula I.

3. The microwave antenna array according to claim 1 , wherein said medium comprises one or more compounds of the formula II.

4. The microwave antenna array according to claim 1 , wherein said medium comprises one or more compounds of the formula III.

5. The microwave antenna array according to claim 2 , wherein a total concentration of the compounds of the formula I in the medium is in the range from 10% to 60% by mass.

6. The microwave antenna array according to claim 3 , wherein a total concentration of the compounds of the formula II in the medium is in the range from 2% to 40% by mass.

7. The microwave antenna array according to claim 4 , wherein a total concentration of the compounds of the formula III in the medium is in the range from 1% to 30% by mass.

8. The microwave antenna array according to claim 1 , wherein a total concentration of the compounds of the formulas I, II, and/or III in the medium is in the range from 10% to 100% by mass.

9. The microwave antenna array according to claim 8 , wherein a total concentration of the compounds of the formulas I, II, and/or III in the medium is in the range from 30% to 95% by mass.

Assignees

• Samsung Electronics Co Ltd

Inventors

• LAPANIK Valeri Ivanovich
• Sasnouski Genadz Mikhailovich
• Shepeleva Elena Alexandrovna
• Evtyushkin Gennadiy Alexadrovich
• KAMYSHEV Timofey Victorovich
• Khripkov Alexander Nikolayevich
• Hong Wonbin

Classifications

• C09K2019/124

  Ph-Ph-Ph-Ph · CPC title

• C09K19/3003

  Compounds containing at least two rings in which the different rings are directly linked (covalent bond) · CPC title

• C09K2019/3016

  Cy-Ph-Ph · CPC title

• C09K2019/125

  Ph-Ph-Ph-Ph-Ph or more Ph rings · CPC title

• H01Q3/36

  with variable phase-shifters · CPC title