Liquid crystalline medium

• Main Authors: JANSEN AXEL, KLASEN-MEMMER MELANIE, SAITO IZUMI
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2013
• Subjects: ADHESIVES; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DYES; FREQUENCY-CHANGING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Liquid crystal media based on a mixture of polar compounds also contain at least one compound with one, two or three trans-1,4-cyclohexylene, cyclohex-3-ene-1,4-diyl and/or cyclohex-1-ene-1,4-diyl groups linked to a 2,3-difluoro-1,4-phenylene group by an acetylene group. Liquid crystal (LC) media based on a mixture of polar compounds, contain at least one compound of formula (I). R 11>, R 12> : 1-15C alkyl or alkenyl (optionally substituted with one CN or CF 3group or at least one halogen, and optionally with one or more CH 2groups replaced by O, S, cyclobutane-1,3-diyl, -Ctriple boundC-, CF 2O, OCO or COO with no direct link between oxygen atoms); (A), (B) : trans-1,4-cyclohexylene, cyclohex-3-ene-1,4-diyl or cyclohex-1-ene-1,4-diyl; a : 0, 1 or 2. Independent claims are included for (1) a method for the production of LC media by mixing compound(s) of formula (I) with mesogenic compound(s) and possibly normal additives and/or stabilisers (2) electro-optical displays with passive or active matrix addressing b