(19)
(11) EP 0 344 753 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.08.1991 Bulletin 1991/33

(43) Date of publication A2:
06.12.1989 Bulletin 1989/49

(21) Application number: 89109852.7

(22) Date of filing: 31.05.1989
(51) International Patent Classification (IPC)4: G09G 3/36
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 01.06.1988 JP 135907/88

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Okada, Shinjiro
    Hiratsuka-shi Kanagawa-ken (JP)
  • Inaba, Yutaka
    Kawaguchi-shi Saitama-ken (JP)

(74) Representative: Tiedtke, Harro, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)


(56) References cited: : 
   
       


    (54) Liquid crystal apparatus and driving method therefor


    (57) A liquid crystal apparatus, includes a liquid crystal device comprising a matrix electrode structure including scanning electrodes and data electrodes intersecting each other and forming a pixel at each intersection, and a ferroelectric liquid crystal having a negative dielectric anisotropy disposed between the scanning electrodes and the data electrodes; and means for applying to a pixel on a selected scanning electrode a bipolar pulse for causing a conversion of one optical state to the other optical state of the pixel, the bipolar data pulse including a unit pulse of one polarity which has a duration set to be shorter than a minimum value τmin of a current response time τ₀.







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