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    5.
    发明专利
    未知

    公开(公告)号：AT169414T

    公开(公告)日：1998-08-15

    申请号：AT93100950

    申请日：1993-01-22

    Applicant: CANON KK

    Inventor： HANYU YUKIO ,  TSUBOYAMA AKIRA ,  TANIGUCHI OSAMU ,  MIHARA TADASHI ,  NAKAMURA KATSUTOSHI ,  MORI SUNAO

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

    Abstract: A ferroelectric liquid crystal device is constituted by disposing a ferroelectric liquid crystal between a pair of substrates having thereon electrodes for voltage application and provided with uniaxial alignment axes, as by rubbing, so as to provide a high pretilt angle of at least 10 degrees. A problematic liquid crystal movement in such a high-pretilt angle ferroelectric liquid crystal device is suppressed by improving a smectic layer structure therein, inclusive of a symmetry of pretilt angles at the pair of substrate boundary surfaces. Such an improved smectic layer structure is accomplished by a realigning treatment after cooling to the chiral smectic phase or in the final stage of the cooling to the chiral smectic phase as by application of an AC electric field and/or by repetitive heating-cooling in the chiral smectic phase. The improved smectic layer structure is represented by, e.g., an X-ray diffraction peak having an increased peak area and/or a decreased half-value width.

    Liquid crystal device
    6.
    发明专利
    Liquid crystal device 未知

    公开(公告)号：AU683995B2

    公开(公告)日：1997-11-27

    申请号：AU1782395

    申请日：1995-05-02

    Applicant: CANON KK

    Inventor： KODERA YASUTO ,  HOTTA YOSHIO ,  HANYU YUKIO ,  MIHARA TADASHI ,  MORI SUNAO

    IPC: G02F1/1333 ,  G02F1/1337 ,  G02F1/141 ,  G02F1/13

    Abstract: A liquid crystal device is constituted by a pair of oppositely disposed substrates having opposing inner surfaces and opposing electrodes thereon, and a chiral smectic liquid crystal disposed between the opposing electrodes. The liquid crystal device has an effective optical modulation region (2) and a peripheral region (3) outside the effective optical modulation region. In the device, liquid crystal molecules in the peripheral region have a pretilt angle ( alpha 2) which is larger than a pretilt angle ( alpha 1) of liquid crystal molecules in the effective optical modulation region. As a result, a local pressure irregularity or a cell thickness change caused by a liquid crystal molecular movement along an extension of the device is effectively suppressed.

    7.
    发明专利
    未知

    公开(公告)号：DE69029529D1

    公开(公告)日：1997-02-13

    申请号：DE69029529

    申请日：1990-04-02

    Applicant: CANON KK

    Inventor： KAWAGISHI HIDEYUKI ,  IWAMOTO HIROFUMI ,  TSUBOYAMA AKIRA ,  MIHARA TADASHI

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

    Abstract: A liquid crystal apparatus, comprising: a liquid crystal cell comprising a pair of substrates (11a,b), and a chiral smectic liquid crystal (1) showing at least two different optically stable states formed by cooling from a uniaxial alignment phase and disposed between the substrates (11a,11b); and a polarizer (P) and an analyzer (A) disposed to sandwiched the liquid crystal cell; wherein the chiral smectic liquid crystal (1), polarizer (P) and analyzer (A) are disposed to satisfy any one of the following sets of conditions I - IV characterized by combination of X, Y and Z directions shown below: with proviso that the chiral smectic liquid crystal (1) is disposed so that the long axes of the chiral smectic liquid crystal molecules are aligned with a twist in the X direction along the direction from the polarizer (P) toward the analyzer (A) to form an average molecular long axis proving one optically stable state, and when the average molecular long axis is switched to provide another optically stable state latched in the Y direction with respect to the direction from the analyzer (A) toward the polarizer (P), the polarizer (P) is disposed to have an electric vector transmission axis which is substantially in the Z direction with respect to the average molecular long axis.

    10.
    发明专利
    未知

    公开(公告)号：DE3856474D1

    公开(公告)日：2001-07-05

    申请号：DE3856474

    申请日：1988-11-10

    Applicant: CANON KK

    Inventor： MIHARA TADASHI ,  INOUE HIROSHI ,  MIZUTOME ATSUSHI ,  TSUBOYAMA AKIRA ,  TANIGUCHI OSAMU ,  ONITSUKA YOSHIHIRO

    IPC: G02F1/1343 ,  G09G3/20 ,  G09G3/36

    Abstract: A liquid crystal apparatus comprises a) a liquid crystal device comprising an electrode matrix composed of scanning electrodes and data electrodes, and a ferroelectric liquid crystal; and b) a driving means. The driving means includes a first drive means for applying a scanning selection signal two or more scanning electrodes apart in one vertical scanning so at to effect in one picture scanning in plural times of vertical scanning, and a second drive means for applying data signals in synchronism with the scanning selection signal.

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