公开(公告)号：DE4012750A1

公开(公告)日：1991-10-24

申请号：DE4012750

申请日：1990-04-21

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF DR ,  HARADA TAKAMASA ,  RIEGER HEINZ DR ,  ROESCH NORBERT DR ,  WEGENER PETER DR

IPC: C09K19/00 ,  G02F1/13 ,  G02F1/133 ,  G02F1/1337

Abstract: The use of alignment layers containing compounds having an amphiphilising effect increases the contrast and/or brightness of the image in the FLC display.

公开(公告)号：NO911435A

公开(公告)日：1991-10-14

申请号：NO911435

申请日：1991-04-11

Applicant: HOECHST AG

Inventor： ESCHER CLAUS ,  ILLIAN GERHARD ,  ROESCH NORBERT ,  HARADA TAKAMASA

IPC: G02F1/133 ,  C07D225/02 ,  C07D273/08 ,  C07D323/00 ,  C07D405/12 ,  C07D498/08 ,  C09K19/56 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/137 ,  G02F1/141 ,  G09F9/35 ,  G02F1/135

CPC classification number: C09K19/56 ,  G02F1/141

公开(公告)号：NO911433L

公开(公告)日：1991-10-14

申请号：NO911433

申请日：1991-04-11

Applicant: HOECHST AG

Inventor： HARADA TAKAMASA ,  ROESCH NORBERT ,  WEGENER PETER

IPC: C09K19/06 ,  C09K19/30 ,  C09K19/32 ,  C09K19/34 ,  C09K19/40 ,  C09K19/54 ,  C09K19/56 ,  C09K19/58 ,  G02F1/13 ,  G02F1/137 ,  C09K19/52 ,  G09F9/35

Abstract: A liquid-crystal mixture comprising at least two components and containing, as one component, a macrocyclic compound of the formula (1) … … where a, b, c, d, e and f, independently of one another, are an integer from zero to 4, where a+b+c+d+e+f is >/= 7, and -A-, -B-, -C-, -D-, -E- and -F- are identical or different and are, for example, -CH2-, -CH=CH-, -CO- or -COO-,… results, in FLC displays, in the formation of uniform alignment and in the avoidance of twist states, which is expressed in significantly improved contrast.

公开(公告)号：NO911433A

公开(公告)日：1991-10-14

申请号：NO911433

申请日：1991-04-11

Applicant: HOECHST AG

Inventor： HARADA TAKAMASA ,  ROESCH NORBERT ,  WEGENER PETER

IPC: C09K19/06 ,  C09K19/30 ,  C09K19/32 ,  C09K19/34 ,  C09K19/40 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  C09K19/52 ,  G02F1/137 ,  G09F9/35

CPC classification number: C09K19/584 ,  C09K19/54

公开(公告)号：FI911719A

公开(公告)日：1991-10-13

申请号：FI911719

申请日：1991-04-10

Applicant: HOECHST AG

Inventor： HARADA TAKAMASA ,  ROESCH NORBERT ,  WINGEN RAINER

IPC: C09K19/54 ,  C09K19/58 ,  G02F1/137 ,  C09K

Abstract: The occurrence of twist states in FLC displays can be suppressed by adding ionophores to FLC mixtures. Applicable ionophores are amides of the general formula I (I) wherein R1, R2, R3 and R4 e.g. are alkyl, cyclohexyl, phenyl or benzyl and X is alkylene with -CH2-groups being replaced by -O-, 1,2-phenylene or 1,2-cyclohexylene.

公开(公告)号：CA2040227A1

公开(公告)日：1991-10-13

申请号：CA2040227

申请日：1991-04-11

Applicant: HOECHST AG

Inventor： ESCHER CLAUS ,  ILLIAN GERHARD ,  ROSCH NORBERT ,  HARADA TAKAMASA

IPC: G02F1/133 ,  C07D225/02 ,  C07D273/08 ,  C07D323/00 ,  C07D405/12 ,  C07D498/08 ,  C09K19/54 ,  C09K19/56 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/137 ,  G02F1/141 ,  G09F9/35 ,  C09K19/08 ,  G02F1/135 ,  C09K19/34

Abstract: Process for the production of an impact-resistant liquid crystal switching and display device Addition of coronands and cryptands to FLC-mixtures makes it possible to bring the FLC material into a homogeneous "bookshelf" or "quasi-bookshelf" geometry. When such a FLC mixture is used shock-damaged displays can be generated by applying a suitable electric field for a short period of time.

公开(公告)号：DE4003012A1

公开(公告)日：1991-08-08

申请号：DE4003012

申请日：1990-02-02

Applicant: HOECHST AG

Inventor： ILLIAN GERHARD DR ,  MUELLER INGRID DR ,  HARADA TAKAMASA

IPC: C07C69/86 ,  C07C13/16 ,  C07C15/02 ,  C07C43/20 ,  C07C69/92 ,  C07C69/94 ,  C07C69/96 ,  C07D20060101 ,  C07D213/30 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D285/12 ,  C07D405/12 ,  C07D417/12 ,  C07F7/08 ,  C09K19/08 ,  C09K19/20 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46 ,  G02F1/13

Abstract: Geminate dimethylalkyl compounds with general formula (I) can be used to good advantage in liquid crystalline mixtures. In the formula, R is, for example, a straight or branched chain (with or without asymmetric C-atom) alkyl or alkenyl with 2 to 16 C-atoms; A , A , A are the same or different and represent, for example, 1.4-phenylene, 1.4-cyclohexylene or pyrimidin-2.5-diyl; M , M are the same or different and represent CO-O, O-CO; G is, for example, the same or different straight or branched chain alkylene with 1 to 16 C-atoms; k, l, m, n are zero or 1; and R is straight-chain alkyl with 1 to 10 C-atoms. The compounds described offer a lower point of fusion in liquid crystalline mixtures, a shift in the thermal limit of the Sc-phase in ferroelectric mixtures, and other improvements in important electro-optical characteristics.

公开(公告)号：NO911433D0

公开(公告)日：1991-04-11

申请号：NO911433

申请日：1991-04-11

Applicant: HOECHST AG

Inventor： HARADA TAKAMASA ,  ROESCH NORBERT ,  WEGENER PETER

IPC: C09K19/06 ,  C09K19/30 ,  C09K19/32 ,  C09K19/34 ,  C09K19/40 ,  C09K19/54 ,  C09K19/56 ,  C09K19/58 ,  G02F1/13 ,  G02F1/137 ,  C09K

Abstract: A liquid-crystal mixture comprising at least two components and containing, as one component, a macrocyclic compound of the formula (1) … … where a, b, c, d, e and f, independently of one another, are an integer from zero to 4, where a+b+c+d+e+f is >/= 7, and -A-, -B-, -C-, -D-, -E- and -F- are identical or different and are, for example, -CH2-, -CH=CH-, -CO- or -COO-,… results, in FLC displays, in the formation of uniform alignment and in the avoidance of twist states, which is expressed in significantly improved contrast.

公开(公告)号：DE3909354A1

公开(公告)日：1990-09-27

申请号：DE3909354

申请日：1989-03-22

Applicant: HOECHST AG

Inventor： ESCHER CLAUS DR ,  DUEBAL HANS-ROLF DR ,  HARADA TAKAMASA ,  HEMMERLING WOLFGANG DR ,  ILLIAN GERHARD DR ,  MUELLER INGRID DR ,  MURAKAMI MIKIO ,  OHLENDORF DIETER DR ,  WINGEN RAINER DR

IPC: G02F1/1337 ,  C09K19/02 ,  C09K19/34 ,  C09K19/58 ,  G02F1/137 ,  G02F1/141

Abstract: Ferroelectric liquid crystal systems with high spontaneous polarization, in particular greater than 35 nC cm , and good orientation properties in the ferroelectric phase, in particular, the SC* phase, contain at least three different optically active compounds, preferably dopants in a non-optically active basic mixture which has a nematic phase above the smectic phase. The optically active compounds are chosen so that they do not all induce a helix with an identical direction of rotation in the nematic phase. Their relative concentration is chosen so that the overall resulting pitch of the helix in the total cholesterol phase is not less than 10 mu m.

公开(公告)号：CA2049960A1

公开(公告)日：1990-09-23

申请号：CA2049960

申请日：1990-03-21

Applicant: HOECHST AG

Inventor： DUBAL HANS-ROLF ,  ESCHER CLAUS ,  HARADA TAKAMASA ,  HEMMERLING WOLFGANG ,  ILLIAN GERHARD ,  MULLER INGRID ,  MURAKAMI MIKIO ,  OHLENDORF DIETER ,  WINGEN RAINER

IPC: C09K19/42 ,  C09K19/34 ,  C09K19/46 ,  C09K19/58

Abstract: - 35 - HOE 89/F 096 Ferroelectric liquid crystalline mixtures The novel ferroelectric liquid-crystalline mixtures are based on at least two mixture components of the general formula (I) (I) but additionally contain at least one optically active dope from one or more of the following groups a) optically active esters of tetrahydrofuran-2- carboxylic acid b) optically active aryl 2,3-epoxyalkyl esthers c) optically active 1,3-dioxolan-4-yl ethers. The ferroelectric LC mixtures have a high spontaneous polarization and facilitate substantial compensation of the pitch of the helix in a nematic phase.