中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

244 records (took 0.025 seconds)

    81.
    发明专利
    未知

    公开(公告)号：AT157463T

    公开(公告)日：1997-09-15

    申请号：AT92118028

    申请日：1992-10-21

    Applicant: CANON KK

    Inventor： ASAOKA MASANOBU ,  TAKAO HIDEAKI ,  HANYU YUKIO ,  KOJIMA MAKOTO

    IPC: C08G73/10 ,  G02F1/1337

    Abstract: A liquid crystal device is constituted by a pair of substrates each provided with a transparent electrode, and a liquid crystal disposed between the substrates; at least one of said pair of substrates having thereon an alignment film comprising (i) a polyimide including principally a recurring unit of the following structural formula (I): wherein R denotes a tetravalent organic group, and R and R denote the same or different alkyl or perfluoroalkyl groups having 1 - 10 carbon atoms, and also at most 20 mol. % of a recurring monoamine unit of the following structural formula (II): wherein R and R denote the same or different alkyl or perfluoroalkyl groups having 1 - 10 carbon atoms, and X denotes an aromatic group, a heterocyclic group or a derivative group thereof; or (ii) a polyimide obtained through a reaction of at least two species of tetracarboxylic anhydrides of the following formula (III): wherein R denotes a tetravalent organic group, and a diamine of the following formula (IV): wherein R and R denote the same or different alkyl or perfluoroalkyl groups having 1 - 10 carbon atoms.

    82.
    发明专利
    未知

    公开(公告)号：DE69216548T2

    公开(公告)日：1997-07-31

    申请号：DE69216548

    申请日：1992-10-29

    Applicant: CANON KK

    Inventor： SHINJO KENJI ,  KITAYAMA HIROYUKI ,  ASAOKA MASANOBU ,  TERADA MASAHIRO ,  YAMADA SYUJI ,  MIZUNO HIROSHI

    IPC: G02F1/1337 ,  G02F1/141 ,  G02F1/137

    Abstract: A ferroelectric liquid crystal device showing improved uniform alignment characteristic and switching characteristic is constituted by a pair of an upper substrate and a lower substrate, and a chiral smectic liquid crystal disposed between the upper and lower substrates. Each of the upper and lower substrates has thereon an electrode for applying a voltage to the liquid crystal and a uniaxial alignment film. The alignment films on the upper and lower substrates are provided with uniaxial alignment axes which cross each other so that the direction of crossing of the uniaxial alignment axes from the lower substrate to the upper substrate is identical to the direction of helical twist in cholesteric phase of the chiral smectic liquid crystal, and the chiral smectic liquid crystal is disposed in such an alignment state that the liquid crystal shows a pretilt angle a, a cone angle H pi beta , an inclination angle w of SmC* layer, and an apparent tilt angle ra satisfying relationships of; H pi beta ra > H pi beta /2. The crossing direction may preferably have a polarity (taken as "positive" in clockwise direction and "negative" in anticlockwise direction) which is the same as the polarity of the spontaneous polarization of the liquid crystal.

    83.
    发明专利
    未知

    公开(公告)号：DE4303236C2

    公开(公告)日：1995-07-27

    申请号：DE4303236

    申请日：1993-02-04

    Applicant: CANON KK

    Inventor： ASAOKA MASANOBU ,  TAKAO HIDEAKI ,  TOGANO TAKESHI ,  KOJIMA MAKOTO

    IPC: C08G73/10 ,  G02F1/1337

    Abstract: A liquid crystal device includes: a liquid crystal disposed between a pair of substrates; at least one of which has thereon an alignment film comprising a polyimide or polyamide imide formed by reaction between a diamine component of formula (1) shown below and at least two acid components selected from tetracarboxylic acid components having a structure of formula (2) shown below at least including a naphthalenetetracarboxylic acid component, and dicarboxylic acid components having a structure of formula (3) shown below; Formula (1): wherein R1 and R2 independently denote an alkyl group or a fluoroalkyl group having 1-10 carbon atoms; Formula (2): Formula (3): wherein +E,crc/A/ and +E,crc/B/ respectively denote a tetravalent or divalent organic residue comprising an aromatic ring, aromatic polycyclic ring or condensed polycyclic ring.

    84.
    发明专利
    未知

    公开(公告)号：ES2059631T3

    公开(公告)日：1994-11-16

    申请号：ES89111491

    申请日：1989-06-23

    Applicant: CANON KK

    Inventor： SHINJO KENJI ,  TAKIGUCHI TAKAO ,  KITAYAMA HIROYUKI ,  KATAGIRI KAZUHARU ,  TERADA MASAHIRO ,  TOGANO TAKESHI ,  YAMASHITA MASATAKA ,  ASAOKA MASANOBU

    IPC: C07D271/10 ,  C07D285/12 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46

    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): wherein R1 denotes a linear or branched alkyl group having 1 - 18 carbon atoms capable of having a substituent; X1 denotes a single bond, -O- or - @O-; Z denotes a single bond or - @O-; and n is an integer of 1 - 12; and at least one compound represented by the following formula (II): wherein R2 and R3 respectively denote a linear or branched alkyl group having 1 - 18 carbon atoms capable of having substituent, at lease one of R2 and R3 being optically active; X2 and X3 respectively denote a single bond, -O-, -O @-, -@O- or -O@O-. m

    86.
    发明专利
    未知

    公开(公告)号：DE68918342D1

    公开(公告)日：1994-10-27

    申请号：DE68918342

    申请日：1989-06-23

    Applicant: CANON KK

    Inventor： SHINJO KENJI ,  TAKIGUCHI TAKAO ,  KITAYAMA HIROYUKI ,  KATAGIRI KAZUHARU ,  TERADA MASAHIRO ,  TOGANO TAKESHI ,  YAMASHITA MASATAKA ,  ASAOKA MASANOBU

    IPC: C07D271/10 ,  C07D285/12 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46

    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): wherein R1 denotes a linear or branched alkyl group having 1 - 18 carbon atoms capable of having a substituent; X1 denotes a single bond, -O- or - @O-; Z denotes a single bond or - @O-; and n is an integer of 1 - 12; and at least one compound represented by the following formula (II): wherein R2 and R3 respectively denote a linear or branched alkyl group having 1 - 18 carbon atoms capable of having substituent, at lease one of R2 and R3 being optically active; X2 and X3 respectively denote a single bond, -O-, -O @-, -@O- or -O@O-. m

Patent Agency Ranking