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    FERROELECTRIC LIQUID CRYSTAL DISPLAY
    1.
    发明专利
    FERROELECTRIC LIQUID CRYSTAL DISPLAY 失效

    公开(公告)号：JPH04230735A

    公开(公告)日：1992-08-19

    申请号：JP19977591

    申请日：1991-04-22

    Applicant: HOECHST AG

    Inventor： HANSUURORUFU DEYUBARU ,  HARADA TAKAMASA ,  HAINTSU RIIGAA ,  NORUBERUTO REESHIYU ,  PEETAA BUEEGENAA

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

    Abstract: PURPOSE: To make it possible to improve the contrast and brightness of images by using a compd. having hydrophilicity and lipophilic in combination as oriented layers. CONSTITUTION: This liquid crystal display has a transparent outer plate, electrodes, polarizers, ferroelectric liquid crystal media and the oriented layers. The oriented layers contain components having the hydrophilicity and lipophilicity. Namely, the oriented layers which are originally hydrophilic and lipophilic are subjected to a treatment to make these components to amphoteric compds. or the amphoteric compds. are chemically bonded to the oriented layers, by which these layers are made amphoteric. The amphoteric compds. have surfactant-like properties and the oriented layers made amphoteric improve the contrast of the display, thereby brightening the images.

    MANUFACTURE OF IMPACT RESISTIVE LIQUID-CRYSTAL SWITCHING AND DISPLAY DEVICE
    4.
    发明专利
    MANUFACTURE OF IMPACT RESISTIVE LIQUID-CRYSTAL SWITCHING AND DISPLAY DEVICE 失效

    公开(公告)号：JPH03296021A

    公开(公告)日：1991-12-26

    申请号：JP15660090

    申请日：1990-06-14

    Applicant: HOECHST AG

    Inventor： KURAUSU ETSUSHIYAA ,  GEEAHARUTO IRIAN ,  NORUBERUTO REESHIYU ,  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

    Abstract: PURPOSE: To inexpensively obtain a shock-resistant liquid crystal switching element and a display device by using a ferroelectric liquid crystal mixture containing an olephilic compd. for a liquid crystal material and applying continuous and periodical voltage till the liquid crystal layer shows bookshelf orientation or quasi-bookshelf orientation before starting the operation. CONSTITUTION: This switching element consists of two supporting plates having at least one orienting layer, at least one polarizer attached to the supporting plate, and a liquid crystal material injected into the space between the two supporting plates. The liquid crystal material to be used here consists of a ferroelectric liquid crystal mixture containing at least one kind of a liquid crystal basic component and at least one kind of an olephilic compd. added to the component. Before starting up the element, continuous and periodical voltage is applied on electrodes of the switching element or a display device till the liquid crystal layer shows bookshelf or quasi-bookshelf orientation. Thereby, the obtd. liquid crystal switching element and the display device have excellent shock resistance and can be produced at a low cost.

    FERROELECTRIC LIQUID CRYSTAL MEMBER HAVING HIGH NATURAL POLARIZATION AND LOW SPIRAL PITCH
    5.
    发明专利
    FERROELECTRIC LIQUID CRYSTAL MEMBER HAVING HIGH NATURAL POLARIZATION AND LOW SPIRAL PITCH 失效

    公开(公告)号：JPH0338623A

    公开(公告)日：1991-02-19

    申请号：JP16654390

    申请日：1990-06-25

    Applicant: HOECHST AG

    Inventor： KURAUSU ETSUSHIYAA ,  BUORUFUGANGU HEMAARINKU ,  GEEAHARUTO IRIAN ,  HARADA TAKAMASA ,  MURAKAMI MIKIO

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

    Abstract: PURPOSE: To provide a ferroelectric liquid crystal(FLC) display which does not exhibit an optical hysteresis even if the value of spontaneous polarization is high by using an FLC mixture having the high spontaneous polarization and the natural spiral pitch smaller than half the thickness of the layer. CONSTITUTION: The FLC display, which can be operated by using a surface stabilized ferroelectric liquid crystal SSFLC technique, is of 1 to 10μm and more particularly 1.2 to 3μm in the thickness of the layer. The ferroelectric liquid crystal(FLC) mixture which exhibits the high spontaneous polarization PS>20nC.cm (measured at 25 deg.C) and of which the natural spiral pitch is below half the thickness of the layer of the SSFLC display is utilized for the FLC display. The characteristics exhibiting the high spontaneous polarization, the first assigned spiral pitch at a smectic phase and the second assigned spiral pitch as a cholesteric phase are satisfied by an asymmetrical liquid crystal base mixture added with a slight amt. of symmetrical additive impurities. The preferable compds. in this asymmetrical liquid crystal base mixture are expressed by formulas (I) and (II).

    LIQUID CRYSTAL DISPLAY
    8.
    发明专利
    LIQUID CRYSTAL DISPLAY 失效

    公开(公告)号：JPH03180815A

    公开(公告)日：1991-08-06

    申请号：JP15659990

    申请日：1990-06-14

    Applicant: HOECHST AG

    Inventor： HANSUURORUFU DEYUUBARU ,  KURAUSU ETSUSHIYAA ,  HARADA TAKAMASA ,  GEEAHARUTO IRIAN ,  MURAKAMI MIKIO ,  HAINTSU RIIGAA ,  NORUBERUTO REESHIYU ,  PEETAA BUEEGENAA ,  RAINAA BUINGEN

    IPC: G02F1/1337

    Abstract: PURPOSE: To improve the lightness, contrast and switching of a liq. crystal display by incorporating a lipophilic compd., a lipophilic property imparting compd. or its mixture into at least one of the constituent elements of the liq. crystal display. CONSTITUTION: In order to improve the max. lightness, max. contrast and display speed of a liq. crystal display, an orienting layer of polyimide or polyamide as one of the constituent elements of the display is composed of 50-99.99wt.% polyimide or polyamide and 0.01-50wt.% one or more kinds of lipophilic compds. or lipophilic property imparting compds. The compds. may be incorporated into an insulating layer, an electrode, a transparent substrate or a polarizing plate. The lipophilic compds. may be monomer, oligomer or polymer compds. and have low polarity and high lipophilic characteristics.

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