TREA

Liquid crystal medium

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Information

  • Patent Application
  • 20070170395
  • Publication Number
    20070170395
  • Date Filed
    January 11, 2007
    17 years ago
  • Date Published
    July 26, 2007
    17 years ago
Information
Abstract
Disclosed are a liquid crystal medium having a birefringence at 20° C. that is lower than 0.08 and contains 1-30% by weight of one or more compounds of formula IA,1-10% by weight of one or more compounds of formula IB,0-9% by weight of one or more compounds of formula IC,
Description
Claims
  • 1. A liquid crystal medium comprising 1-30% by weight of one or more compounds of formula IA,1-10% by weight of one or more compounds of formula IB,0-9% by weight of one or more compounds of formula IC,
  • 2. A medium according to claim 1, comprising one or more compounds of the following formulae
  • 3. A medium according to claim 1, further comprising one or more compounds selected from compounds of formulae II, III, IV, V, VI and VII
  • 4. A medium according to claim 1, further comprising one or more compounds of the following formulae
  • 5. A medium according to claim 1, further comprising one or more compounds of the following formulae
  • 6. A medium according to claim 1, further comprising one or more compounds of the following formulae
  • 7. A medium according to claim 1, further comprising one or more compounds of the following formula
  • 8. A medium according to claim 1, comprising one or more compounds of formulae IA, IB, IC, of IIa,
  • 9. A medium according to claim 3, comprising 1-30% by weight of compounds of formula IA,1-10% by weight of compounds of formula IB,1-9% by weight of compounds of formula IC,10-50% by weight of compounds of formula II,10-50% by weight of compounds of formula VI.
  • 10. A medium according to claim 6, wherein X0 is F or OCF3.
  • 11. A medium according to claim 1, wherein R1 and R2 in formulae IA, IB and/or IC are straight-chain alkyl or alkoxy with 1 to 12 C-atoms.
  • 12. A medium according to claim 1, wherein the medium has a birefringence at 20° C. that is lower than 0.075.
  • 13. A medium according to claim 1, wherein the medium has a birefringence at 20° C. that is from 0.06 to 0.074.
  • 14. A medium according to claim 1, wherein the medium has a birefringence at 20° C. that is from 0.07 to 0.073.
  • 15. An electro-optical liquid crystal display containing a liquid crystal medium according to claim 1.
  • 16. A process of preparing a medium according to claim 1, comprising mixing one or more compounds of formula IA and IB and optionally IC.
Priority Claims (1)
Number Date Country Kind
06000715.0 Jan 2006 EP regional