公开(公告)号：JPH02221929A

公开(公告)日：1990-09-04

申请号：JP32977689

申请日：1989-12-21

Applicant: HOECHST AG

Inventor： KURAUSU ETSUSHIERU ,  HANSUURORUFU DEYUBAARU ,  MURAKAMI MIKIO ,  GERUHARUTO IRURIAN ,  DEIITERU OORENDORUFU

IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/141

Abstract: PURPOSE: To make it possible to drastically decrease various phenomena due to optical hysteresis or to suppress the same by directly bringing at least one of electrodes of a ferroelectric liquid crystal display into contact with a liquid crystal medium. CONSTITUTION: The electrodes of the ferroelectric liquid crystal(FLC) display device includes the plural counter electrodes arranged to longitudinal and transverse stripe states in front and rear of the FLC layer. Both electrodes preferably come into direct contact with the liquid crystal medium and the electrodes in direct contact with the liquid crystal medium can simultaneously be an oriented layer if the electrode material is adequately selected. Bringing of the one electrode into contact with the medium and insulating the other electrode therefrom are advantageous for prevention of shorting with the display of a large area in particular. The lowering of the optical hysteresis is more significant as the electrical conductivity of the electrodes is higher. The oriented layers are formed out of two layers and the oriented layer facing the medium is formed out of a conductive org. material and the second layer of the further higher conductive material.

公开(公告)号：JPH02148023A

公开(公告)日：1990-06-06

申请号：JP25717589

申请日：1989-10-03

Applicant: HOECHST AG

Inventor： HANSUURORUFU DEYUBARU ,  MURAKAMI MIKIO ,  OTSUTOO HERUMANNSHIERUHERU ,  ARUNORUTO SHIYUNERERU

IPC: G02F1/13 ,  C08G69/32 ,  C08L77/00 ,  G02F1/1337

Abstract: PURPOSE: To attain curing at

公开(公告)号：JPH0291065A

公开(公告)日：1990-03-30

申请号：JP20709289

申请日：1989-08-11

Applicant: HOECHST AG

Inventor： UORUFUGANGU HEMUMERURINGU ,  HANSUURORUFU DEYUBAARU ,  KURAUSU ETSUSHIERU ,  GERUHARUTO IRIAN ,  INOGUCHI YOSHIO ,  INGURIITO MIYUURAA ,  MURAKAMI MIKIO ,  DEIITAA OORENDORUFU ,  RAINERU UINGEN

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：JPH0892260A

公开(公告)日：1996-04-09

申请号：JP17649595

申请日：1995-07-12

Applicant: HOECHST AG

Inventor： UORUFUGANGU HEMUMERURINGU ,  HANSUURORUFU DEYUBAARU ,  KURAUSU ETSUSHIERU ,  GERUHARUTO IRIAN ,  INOGUCHI YOSHIO ,  INGURIITO MIYUURAA ,  MURAKAMI MIKIO ,  DEIITAA OORENDORUFU ,  RAINERU UINGEN

IPC: G02F1/13 ,  C07F7/08 ,  C07F7/10 ,  C09K19/40 ,  C09K19/42 ,  C09K19/46 ,  G02F1/137 ,  G02F1/141

公开(公告)号：JPH0881476A

公开(公告)日：1996-03-26

申请号：JP17649695

申请日：1995-07-12

Applicant: HOECHST AG

Inventor： UORUFUGANGU HEMUMERURINGU ,  HANSUURORUFU DEYUBAARU ,  KURAUSU ETSUSHIERU ,  GERUHARUTO IRIAN ,  INOGUCHI YOSHIO ,  INGURIITO MIYUURAA ,  MURAKAMI MIKIO ,  DEIITAA OORENDORUFU ,  RAINERU UINGEN

IPC: G02F1/13 ,  C07F7/08 ,  C07F7/10 ,  C09K19/40 ,  C09K19/42 ,  C09K19/46 ,  G02F1/137 ,  G02F1/141

公开(公告)号：JPH02262579A

公开(公告)日：1990-10-25

申请号：JP24357189

申请日：1989-09-21

Applicant: HOECHST AG

Inventor： UORUFUGANGU HEMUMERURINGU ,  INGURIITO MIYUURAA ,  HANSUURORUFU DEYUBAARU ,  KURAUSU ETSUSHIERU ,  GERUHARUTO IRIAN ,  MURAKAMI MIKIO ,  DEIITAA OORENDORUFU ,  RAINERU UINGEN

IPC: C07D303/48 ,  C07D317/32 ,  C07D317/34 ,  C07D317/72 ,  C07D405/12 ,  C07D405/14 ,  C07D407/12 ,  C07D407/14 ,  C07D409/12 ,  C07D409/14 ,  C07D417/12 ,  C07D417/14 ,  C09K19/34 ,  C09K19/58

公开(公告)号：DE69315676D1

公开(公告)日：1998-01-22

申请号：DE69315676

申请日：1993-12-21

Applicant: HOECHST AG ,  AKASHI MITSURU

Inventor： AKASHI MITSURU PROF DR ,  ITOH HARUHIKO ,  MURAKAMI MIKIO

IPC: C08G77/455 ,  G02F1/1337

Abstract: The liquid crystal display device of the present invention comprises at least one aramide-silicone-multiblock copolymer having the repeating unit represented by the following formula as an alignment layer material: A desired pretilt angle can be obtained by altering the content of polysiloxane in the aramide-silicone-multiblock copolymer and the pretilt angle is nearly uniform irrespective of an annealing temperature and a rubbing strength.

公开(公告)号：DE59307349D1

公开(公告)日：1997-10-16

申请号：DE59307349

申请日：1993-06-21

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  HOECHST AG

Inventor： JUNGBAUER DIETMAR ,  RIEGER HEINZ ,  ESCHER CLAUS ,  ILLIAN GERHARD ,  NAGAO KAZUYA ,  MURAKAMI MIKIO ,  UOMURA TSUYOSHI ,  OHNISHI HIROYUKI ,  FUJIWARA SHOZO

IPC: G02F1/137 ,  G02F1/133 ,  G02F1/1337 ,  G02F1/141 ,  G09G3/36

Abstract: PCT No. PCT/EP93/01574 Sec. 371 Date May 1, 1995 Sec. 102(e) Date May 1, 1995 PCT Filed Jun. 21, 1993 PCT Pub. No. WO94/01802 PCT Pub. Date Jan. 20, 1994A process for the stabilization of the spatial alignment of the smectic layers in an FLC switching and/or display element, in which the original position of the smectic layers has been modified by electrical field treatment, which comprises alternately switching the elements during non-operation and/or when a certain temperature is exceeded which is above a predetermined temperature range which includes the operating temperature region and/or when the temperature falls below a certain temperature which is below a predetermined temperature range which includes the operating temperature region. Use of the process according to the invention ensures long-term functioning of the switching and display device, even in the case of repeated regeneration of the quasi-bookshelf geometry, and prevents worsening in the contrast and brightness and the occurrence of ghost images.

公开(公告)号：AT99299T

公开(公告)日：1994-01-15

申请号：AT89117264

申请日：1989-09-19

Applicant: HOECHST AG

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

IPC: C07D303/48 ,  C07D317/32 ,  C07D317/34 ,  C07D317/72 ,  C07D405/12 ,  C07D405/14 ,  C07D407/12 ,  C07D407/14 ,  C07D409/12 ,  C07D409/14 ,  C07D417/12 ,  C07D417/14 ,  C09K19/34 ,  C09K19/58

公开(公告)号：NO913696A

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