(19)
(11) EP 1 908 592 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
02.07.2008 Bulletin 2008/27

(43) Date of publication:
09.04.2008 Bulletin 2008/15

(21) Application number: 07018594.7

(22) Date of filing: 21.09.2007
(51) International Patent Classification (IPC): 
B41J 2/05(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 04.10.2006 JP 2006273414

(71) Applicant: Canon Kabushiki Kaisha
Ohta-ku Tokyo (JP)

(72) Inventors:
  • Omata, Koichi
    Ohta-ku Tokyo (JP)
  • Imanaka, Yoshiyuki
    Ohta-ku Tokyo (JP)
  • Takeuchi, Souta
    Ohta-ku Tokyo (JP)
  • Yamaguchi, Takaaki
    Ohta-ku Tokyo (JP)
  • Kubo, Kousuke
    Ohta-ku Tokyo (JP)

(74) Representative: Weser, Thilo 
Weser & Kollegen Patentanwälte Radeckestrasse 43
81245 München
81245 München (DE)

   


(54) Element substrate, and printhead, head cartridge, and printing apparatus using the element substrate


(57) This invention relates to a printhead element substrate (100) having a plurality of electrothermal transducers (206) and a plurality of switching elements (207) which drive the plurality of electrothermal transducers (206). The element substrate has a level converter (116) which is shared by adjacent electrothermal transducers and steps up an input driving signal, and a switch circuit which supplies the driving signal output from the level converter to one of the adjacent electrothermal transducers. The switch circuit switches the supply destination of the driving signal in accordance with an external input selection signal.