LIQUID CRYSTAL MEDIUM

• Main Authors: MARTINA WINDHORST, REIFFENRATH VOLKER, BREMER MATTHIAS, HIRSCHMANN HARALD, MONIKA BAUER
• Format: Patent
• Language: English; Japanese
• Published: 07.04.2016
• 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

PROBLEM TO BE SOLVED: To provide a liquid crystal medium that exhibits a behavior with high reliability even at an extremely high temperature or low temperature when used for an active matrix display based on a VA, PSA, PS-VA, PA-VA, PALC, FFS, PS-FFS, IPS or PS-IPS effect, and has no persistence of an image after a long-term operation.SOLUTION: The liquid crystal medium comprises at least one compound represented by formula I. In the formula, individual groups each independently represent, and Rrepresents an alkenyl group having 2 to 12 carbon atoms; Land Lrepresent F, Cl, CF, OCF, CHF; n represents 1 or 2; and A represents a trans-1,4-cyclohexylene group or a 1,4-phenylene group, which may be substituted by one or two identical or different groups L.SELECTED DRAWING: None 【課題】ＶＡ、ＰＳＡ、ＰＳ−ＶＡ、ＰＡ−ＶＡ、ＰＡＬＣ、ＦＦＳ、ＰＳ−ＦＦＳ、ＩＰＳまたはＰＳ−ＩＰＳ効果を基礎とするアクティブマトリックスディスプレイへの使用して、極度の高温及び低温においても信頼性の高い挙動を示し、長期の画像の固着を示さない液晶媒体の提供。【解決手段】少なくとも１種類の式Ｉで表される化合物を含む液晶媒体。（個々の基は夫々独立に挙動する；Ｒ１１はＣ２〜１２のアルケニル基；Ｌ１及びＬ２は、Ｆ、Ｃｌ、ＣＦ３、ＯＣＦ３又はＣＨＦ２；ｎは、１又は２；Ａは１個または２個の同一もしくは異なる基Ｌ１で置換されていてもよいトランス−１，４−シクロヘキシレン基又は１，４−フェニレン基）【選択図】なし