公开(公告)号：DE59006849D1

公开(公告)日：1994-09-22

申请号：DE59006849

申请日：1990-05-11

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF ,  ESCHER CLAUS ,  ILLIAN GERHARD ,  MURAKAMI MIKIO ,  OHLENDORF DIETER

IPC: G02F1/1333 ,  G02F1/1335 ,  G02F1/1362 ,  G02F1/137 ,  G02F1/141

Abstract: PCT No. PCT/EP90/00761 Sec. 371 Date Nov. 27, 1991 Sec. 102(e) Date Nov. 27, 1991 PCT Filed May 11, 1990 PCT Pub. No. WO90/15360 PCT Pub. Date Dec. 13, 1990.A ferroelectric liquid crystal switching or display device, in which the liquid crystal film has a constant thickness, wherein one of the glass sheets in the device is planar and the other glass sheet has at least one step. The switching or display device of the present invention does not require shortened switching times or more contacts or drivers and does not show unwanted switching.

公开(公告)号：DE58902753D1

公开(公告)日：1992-12-24

申请号：DE58902753

申请日：1989-08-08

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C07D307/24 ,  C07D307/56 ,  C07D405/12 ,  C07D405/14 ,  C07D407/12 ,  C07D407/14 ,  C07D409/12 ,  C07D409/14 ,  C07D417/12 ,  C07D417/14 ,  C09K19/54 ,  C09K19/58 ,  G02F1/137 ,  G02F1/141

Abstract: Optically active tetrahydrofuran-2-carboxylic acid esters containing a mesogenic molecular building block are suitable as dopes in liquid-crystal mixtures. They result in liquid-crystalline ferroelectric phases having short switching times and in electroclinic phases having high electroclinic coefficients. A further advantage is that they induce a helix of very low pitch, so they are also suitable for helix compensation in LC mixtures. The compounds are symbolised by the general formula in which the symbols and indices essentially have the following meanings: R = alkyl/alkenyl or tetrahydrofurancarbonyloxy or -thio; j, l and n = zero, 1 or 2; k and m = zero or 1; -A , -A and -A = phenylene, cycloalkylene or corresponding N-, O- or S-containing heterocycles; -M and -M = bridges, such as -CO-O-, -OCH2- or -CH=CH-; and X = O or S.

公开(公告)号：NO913675L

公开(公告)日：1991-11-15

申请号：NO913675

申请日：1991-09-18

Applicant: HOECHST AG

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

IPC: C09K20060101 ,  C09K19/34 ,  C09K19/46 ,  C09K19/58

公开(公告)号：NO913696L

公开(公告)日：1991-09-19

申请号：NO913696

申请日：1991-09-19

Applicant: HOECHST AG

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

IPC: C09K19/34 ,  G02F20060101 ,  G02F1/137

公开(公告)号：NO913675D0

公开(公告)日：1991-09-18

申请号：NO913675

申请日：1991-09-18

Applicant: HOECHST AG

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

IPC: C09K20060101 ,  C09K19/34 ,  C09K19/46 ,  C09K19/58 ,  C09K

公开(公告)号：CA2034896A1

公开(公告)日：1991-07-26

申请号：CA2034896

申请日：1991-01-24

Applicant: HOECHST AG

Inventor： DUBAL HANS-ROLF ,  MURAKAMI MIKIO ,  DROTLOFF HANS-OTTO ,  BREKNER MICHAEL

IPC: C09K19/56 ,  C08G65/40 ,  G02F1/1337 ,  C09K19/20

Abstract: HOE 90/F 018 of the disclosure: Use of polyaryl ether ketones as alignment layers Use of polyaryl ether ketones comprising structural units -O-A-O-B- gives alignment layers for liquid-crystal display and switching devices which have high transparency, low water absorption capacity and particularly uniform alignment both of smectic and of nematic liquid crystals, and thus produce a high contrast capability.

公开(公告)号：NO902795L

公开(公告)日：1990-12-27

申请号：NO902795

申请日：1990-06-22

Applicant: HOECHST AG

Inventor： ESCHER CLAUS ,  HEMMERLING WOLFGANG ,  ILLIAN GERHARD ,  HARADA TAKAMASA ,  MURAKAMI MIKIO

IPC: G02F1/1337 ,  C09K19/02 ,  C09K19/34 ,  C09K19/58 ,  G02F1/137 ,  G02F1/141 ,  G02F1/13 ,  G02F1/133

Abstract: Liquid-crystalline materials are becoming increasingly important in electrooptical switching and display devices. Recently, ferroelectric liquid-crystalline mixtures have also been investigated widely and employed in displays. A particularly important physical parameter for describing FLC mixtures is the spontaneous polarisation (Ps). On the one hand, a high spontaneous polarisation results in short response times, but on the other hand, high Ps values result in optical hysteresis, which causes, inter alia, so-called "ghost images". The use of FLC mixtures of high spontaneous polarisation (Ps 20 nC/cm ) and a natural helical pitch of less than half the layer thickness in an SSFLC display having a layer thickness of from 1 to 10 mu m allows the problem of optical hysteresis to be circumvented, in spite of the high spontaneous polarisation. FLC mixtures in which Ps is > 40 nC/cm can also be switched under these conditions.

公开(公告)号：DE3917472A1

公开(公告)日：1990-12-06

申请号：DE3917472

申请日：1989-05-30

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  ILLIAN GERD DR ,  MURAKAMI MIKIO ,  OHLENDORF DIETER DR

IPC: G02F1/1333 ,  G02F1/1335 ,  G02F1/1362 ,  G02F1/137 ,  G02F1/141

Abstract: PCT No. PCT/EP90/00761 Sec. 371 Date Nov. 27, 1991 Sec. 102(e) Date Nov. 27, 1991 PCT Filed May 11, 1990 PCT Pub. No. WO90/15360 PCT Pub. Date Dec. 13, 1990.A ferroelectric liquid crystal switching or display device, in which the liquid crystal film has a constant thickness, wherein one of the glass sheets in the device is planar and the other glass sheet has at least one step. The switching or display device of the present invention does not require shortened switching times or more contacts or drivers and does not show unwanted switching.

公开(公告)号：CA2016632A1

公开(公告)日：1990-11-13

申请号：CA2016632

申请日：1990-05-11

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C07C13/04 ,  C07C13/28 ,  C07C22/00 ,  C07C25/00 ,  C07C43/184 ,  C07C43/205 ,  C07C43/21 ,  C07C69/92 ,  C07C255/45 ,  C07D213/30 ,  C07D237/08 ,  C07D237/14 ,  C07D237/16 ,  C07D237/18 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D241/12 ,  C07D241/18 ,  C07D285/12 ,  C07D285/125 ,  C07D285/13 ,  C07D405/12 ,  C09K19/20 ,  C09K19/30 ,  C09K19/34 ,  C07D239/24 ,  C07D213/55

Abstract: HOE 89/F 145 of the disclosure Cyclopropylalkyl or -alkenyl compounds, processes for their preparation, and their use in liquid-crystalline mixtures The novel cyclopropylalkyl or -alkenyl compounds have the general formula In this formula, the symbols A1, A2 and A3 are unsubstituted or, in particular, substituted (by halogens or CN), aromatic or heteroaromatic molecular building blocks, such as 1,4-phenylene or pyrimidine-2,5-diyl, which are linked via a single bond or via functional groups M1 and/or M2, such as CO-O or CH2-O; H and m are zero or 1; j, 1 and n are zero, 1 or 2. The radicals R2, R3 and R4 are H or alkyl/alkenyl, R1 is alkyl/alkenyl or one of the substituents known from LC chemistry, such as an .alpha.-haloalkanoic acid radical. G is alkylene or alkenylene.

公开(公告)号：DE3909356A1

公开(公告)日：1990-09-27

申请号：DE3909356

申请日：1989-03-22

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46 ,  C09K19/58

Abstract: PCT No. PCT/EP90/00458 Sec. 371 Date Nov. 6, 1991 Sec. 102(e) Date Nov. 6, 1991 PCT Filed Mar. 21, 1990 PCT Pub. No. WO90/11336 PCT Pub. Date Oct. 4, 1990.The novel liquid-crystalline mixtures (in the case of ferroelectric behavior they additionally contain an optically active compound as dope) are based on at least two mixture components of the general formula (I) and at least one carboxylate of the general formula (II), (III) or (IV). (* CHEMICAL STRUCTURE *) (I) (* CHEMICAL STRUCTURE *) (II) X = O or a single bond (* CHEMICAL STRUCTURE *) (III) (* CHEMICAL STRUCTURE *) (IV) The mixtures have favorable properties for use in electrooptical display elements, such as high contrast, low melting point and short switching times.