Liquid-crystal medium, and electro-optical display containing same
AssigneeMerck Patent GmbH
InventorsMelanie Klasen-Memmer, Clarissa Weller, Matthias Bremer
Life of this patent
Estimating the term…
Abstract
The present invention relates to nematic liquid-crystal media which comprise a) a dielectrically negative, liquid-crystalline component A comprising one or more compounds of the formula I in which the parameters are as defined in the text, and b) a dielectrically negative, liquid-crystalline component B, and optionally c) a dielectrically neutral, liquid-crystalline component C, and optionally d) a dielectrically positive, liquid-crystalline component D, and to the use of these media in liquid-crystal displays, and to liquid-crystal displays which use these media, in particular VAN and IPS displays.
Claims21
A nematic liquid-crystal medium, which comprises
- a) a dielectrically negative, liquid-crystalline component A which comprises one or more dielectrically negative compounds of one of the formulae I-1, I-3 and I-4:
- in which
- R11 is alkyl having from 1 to 7 carbon atoms, alkoxy having from 1 to 7 carbon atoms or alkenyloxy having from 2 to 7 carbon atoms,
- R12 is alkyl or alkoxy having from 1 to 7 carbon atoms or alkenyl, alkenyloxy or alkoxyalkyl having from 2 to 7 carbon atoms, and
- Z12 is OCF2 or CF2O, and
- b) a dielectrically negative, liquid-crystalline component, B, different from component A, and
- c) optionally, a dielectrically neutral, liquid-crystalline component C, and
- d) optionally, a dielectrically positive, liquid-crystalline component D.
Dependencies are inferred from the claim text.