(19)
(11) EP 0 428 250 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.07.1992 Bulletin 1992/27

(43) Date of publication A2:
22.05.1991 Bulletin 1991/21

(21) Application number: 90309583.4

(22) Date of filing: 31.08.1990
(51) International Patent Classification (IPC)5: G09G 3/36
(84) Designated Contracting States:
DE ES FR GB

(30) Priority: 31.08.1989 JP 102406/89
14.08.1990 JP 215496/90

(71) Applicant: SHARP KABUSHIKI KAISHA
Osaka 545 (JP)

(72) Inventor:
  • Shibata, Takeshi
    Shioya-gun, Tochigi-ken (JP)

(74) Representative: Brown, Kenneth Richard et al
R.G.C. Jenkins & Co. 26 Caxton Street
London SW1H 0RJ
London SW1H 0RJ (GB)


(56) References cited: : 
   
     
    Remarks:
    The title of the invention has been amended (Guidelines for Examination in the EPO, A-III, 7.3).
     


    (54) Driver circuit for a display panel


    (57) A common driver circuit for driving a load heavy in a capacitive property such as a common electrode or the like of a liquid crystal panel is composed of the simple circuit construction provided with each circuit of the voltage follower, the low-pass filter, the feedback, the control so that the variation in the direction current component which gives bad influences in the processing of the signals of this type of circuit is restrained to improve the reliability, and the direct current is not required to be cut to eliminate the direct current cutting capacitor of the large capacity.







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