Patent ID: 7321444
Filing Date: 2008-01-22
Classification: B41J

Abstract:
1. An inkjet print head substrate on which is provided a print head assembly, the print head assembly comprising: an ink supply opening; an array of printing elements provided along one long side of the ink supply opening and divided into a plurality of groups of printing elements; an array of driving circuits provided along one long side of the ink supply opening and arranged to correspond to the printing elements, respectively, for driving the corresponding printing elements, respectively; a selection circuit common to the plurality of groups of printing elements of the array for selecting a printing element to be driven in each group; and data supply means for supplying driving data to the driving circuits, wherein the selection circuit has common lines through which electric signals are supplied for driving the plurality of groups of printing elements of the away by selecting a printing element to be driven in each group, wherein the data supply means comprises a plurality of shift registers, the plurality of shift registers are provided at one side with respect to extension lines extending from both longitudinal ends of the ink supply opening, and each shift register is arranged to supply driving data to one or more of the driving circuits for driving the corresponding printing elements, of the plurality of groups of printing elements, which are closer than non-corresponding printing elements to the shift register, wherein another array of printing elements, another array of driving circuits, and another selection circuit are provided along another long side of the ink supply opening, and wherein the data supply means further comprises another plurality of shift registers, provided at another side with respect to the extension lines.