(19)
(11) EP 0 717 305 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.11.1996 Bulletin 1996/47

(43) Date of publication A2:
19.06.1996 Bulletin 1996/25

(21) Application number: 96102488.2

(22) Date of filing: 21.08.1991
(51) International Patent Classification (IPC)6: G02F 1/137, G09G 3/36
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30) Priority: 22.08.1990 JP 221709/90
22.08.1990 JP 221710/90
31.07.1991 JP 192048/91

(62) Application number of the earlier application in accordance with Art. 76 EPC:
91114021.8 / 0473058

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

(72) Inventors:
  • Kaneko, Shuzo
    Ohta-ku, Tokyo (JP)
  • Fujiwara, Ryoji
    Ohta-ku, Tokyo (JP)
  • Yoshida, Akio
    Ohta-ku, Tokyo (JP)
  • Maruyama, Tomoko
    Ohta-ku, Tokyo (JP)

(74) Representative: Pellmann, Hans-Bernd, Dipl.-Ing. 
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)

 
Remarks:
This application was filed on 19 - 02 - 1996 as a divisional application to the application mentioned under INID code 62.
 


(54) Liquid crystal element and apparatus


(57) Disclosed is a liquid crystal element comprising a liquid crystal exhibiting spontaneous polarization, a pair of electrode substrates for sandwiching said liquid crystal therebetween, characterized in that insulating layers are formed between said electrode substrates and said liquid crystal, wherein a spontaneous polarization Ps value of said liquid crystal, an interelectrode composite capacitance Ci of said insulation layers, and a voltage threshold value Vth of optical response of said liquid crystal in said liquid crystal element satisfy the following condition:






Search report