LIQUID-CRYSTALLINE MEDIUM

• Main Authors: REUTER MARCUS, WINDHORST MARTINA, BAUER MONIKA, REIFFENRATH VOLKER, HIRSCHMANN HARALD
• Format: Patent
• Language: English; Korean
• Published: 11.07.2022
• 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

The present invention relates to a liquid-crystalline medium comprising at least one compound of chemical formula I and use thereof, in particular in an active-matrix display based on VA, PSA, PA-VA, SS-VA, SA-VA, PS-VA, PALC, IPS, PS-IPS, FFS or PS-FFS effects. In the formula, each of R^1 and R^1*, independently, represents an alkyl or alkoxy radical having 1 to 15 carbon atoms. Also, each of one or more CH_2 groups of the radicals, independently, may be replaced with -C≡C-, -CF_2O-, -OCF_2-, -CH=CH-, -O-, -CO-O-, or -O-CO- in a way in which the O atoms are not directly connected to each other. In addition, one or more H atoms may be replaced with a halogen. Moreover, each of L^1 and L^2, independently, represents F, Cl, CF_3, or CHF_2. 본 발명은 하나 이상의 하기 화학식 I의 화합물을 포함하는 액정 매질, 및 특히 VA, PSA, PA-VA, SS-VA, SA-VA, PS-VA, PALC, IPS, PS-IPS, FFS 또는 PS-FFS 효과에 기초한 능동-매트릭스 디스플레이에서의 이의 용도에 관한 것이다: TIFFpat00244.tif2671 상기 식에서, R1 및 R1*은 각각, 서로 독립적으로, 1 내지 15개의 탄소 원자를 갖는 알킬 또는 알콕시 라디칼을 나타내고, 이때, 이들 라디칼 중 하나 이상의 CH2 기는 또한, 각각 서로 독립적으로, O 원자들이 서로 직접 연결되지 않는 방식으로 -C≡C-, -CF2O-, -OCF2-, -CH=CH-, TIFFpat00245.tif736, -O-, -CO-O-, 또는 -O-CO-로 대체될 수 있으며, 또한, 하나 이상의 H 원자는 할로겐으로 대체될 수 있고, L1 및 L2은 각각, 서로 독립적으로, F, Cl, CF3 또는 CHF2를 나타낸다.