(19)
(11) EP 0 434 033 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.04.1992 Bulletin 1992/17

(43) Date of publication A2:
26.06.1991 Bulletin 1991/26

(21) Application number: 90124774.2

(22) Date of filing: 19.12.1990
(51) International Patent Classification (IPC)5: G09G 3/36
(84) Designated Contracting States:
CH DE FR GB LI

(30) Priority: 19.12.1989 JP 329055/89

(71) Applicant: SEIKO EPSON CORPORATION
Shinjuku-ku Tokyo-to (JP)

(72) Inventor:
  • Katsunori, Yamazaki, c/o Seiko Epson Corporation
    Suwa-shi, Nagano-ken (JP)

(74) Representative: Hoffmann, Eckart, Dipl.-Ing. et al
Patentanwalt, Bahnhofstrasse 103
82166 Gräfelfing
82166 Gräfelfing (DE)


(56) References cited: : 
   
       


    (54) Liquid crystal display device


    (57) A liquid crystal display device comprises a liquid crystal panel (201) provided with a pair of substrates (202, 203) sandwiching a liquid crystal layer therebetween, a scanning electrode group (Y1-Y6) on one of said substrates, a signal electrode group (X1-X6) on the other of said substrates, a pixel being formed at each crossing point between a scanning electrode and a signal electrode, and means (205, 213) for applying a scanning voltage wave to at least one end of said scanning electrode group and for applying a signal voltage wave to at least one end of said signal electrode group to display images and characters (display pattern) and for superimposing a correcting voltage to the scanning voltage wave and/or the signal voltage wave in accordance with the display pattern. Additional means (104) are provided for varying the value and/or the time of application of said correcting voltage in accordance with the pixel positions from said at least one end of said scanning electrode group and/or in accordance with the pixel positions from said at least one end of the signal electrode group. Thereby the evenness of the display can be remarkably improved.






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