(19)
(11) EP 1 849 604 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.09.2008 Bulletin 2008/38

(43) Date of publication A2:
31.10.2007 Bulletin 2007/44

(21) Application number: 07250143.0

(22) Date of filing: 15.01.2007
(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 NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 26.04.2006 CN 200610078608

(71) Applicant: International United Technology Co., Ltd.
ChuPei, Hsinchu (TW)

(72) Inventors:
  • Lai, Wei-Fu
    Nantun District Taichung City 408 (TW)
  • Huang, Fu-Sheng
    Hsinchu City 300 (TW)
  • Lee, Francis Chee-Shuen
    Hsinchu City 300 (TW)

(74) Representative: White, Duncan Rohan 
Marks & Clerk 90 Long Acre
London WC2E 9RA
London WC2E 9RA (GB)

   


(54) Ink jet printhead control circuit


(57) An ink jet printhead control circuit is provided. The ink jet printhead control circuit includes at least a nozzle firing circuit (301) and a nozzle firing control circuit (302). The nozzle firing circuit (301) includes a switch (SW301) and a heating resistor (R301). The switch (SW301) and the heating resistor (R301) are coupled in series between a power voltage level (P) and a predetermined voltage level (Vss). The nozzle firing control circuit (302) is electrically coupled to the nozzle firing circuit (301), and receives a selection signal (SEL) and an address signal (ADD). When the address signal (ADD) and the selection signal (SEL) are enabled, the nozzle firing circuit (301) is controlled to apply the power voltage level (P) to turn on the switch (SW301) to drive the heating resistor (R301) so that droplets of ink are jetted out.







Search report