(19)
(11) EP 0 516 091 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.03.1993 Bulletin 1993/10

(43) Date of publication A2:
02.12.1992 Bulletin 1992/49

(21) Application number: 92108963.7

(22) Date of filing: 27.05.1992
(51) International Patent Classification (IPC)5: B41J 2/355
(84) Designated Contracting States:
DE FR GB

(30) Priority: 27.05.1991 JP 121446/91

(71) Applicant: Shinko Electric Co. Ltd.
Chuo-ku Tokyo 103 (JP)

(72) Inventor:
  • Fukuda, Hiroaki, c/o Ise Fact. Shinko Elect.Co.Ltd
    Ise-shi, Mie-ken 516 (JP)

(74) Representative: Goddar, Heinz J., Dr. 
FORRESTER & BOEHMERT Franz-Joseph-Strasse 38
80801 München
80801 München (DE)


(56) References cited: : 
   
       


    (54) System for driving thermal head of dye thermal printer


    (57) A system for driving the thermal head (10) of a dye thermal printer for controlling energizing time of heating resistors (11) by applying a drive pulse having a pulse width corresponding to a modulation density of an input data every time the data is input thereto, characterized in that the drive pulse having the pulse width corresponding to the modulation density is applied to the heating resistor (11) until the modulation density reaches a given modulation density and repetition pulses having a given interval are applied thereto when the modulation density exceeds the given modulation density so that the high speed printing can be realized compared with the conventional system by preventing the transfer film (30) from being crumpled.






    Search report