Patent ID: 8177333
Filing Date: 2012-05-15
Classification: B41J

Abstract:
1. An element board for a printhead comprising: a substrate; a plurality of printing elements provided on the substrate and aligned in a predetermined direction, wherein the plurality of printing elements are divided to form a plurality of groups, each group comprising a predetermined number of adjacent printing elements; a plurality of element selection circuits provided on the substrate, each provided corresponding to one of the groups and outputting a first signal corresponding to the printing elements included in the corresponding group; a driving selection circuit which is provided on the substrate and outputs a second signal defining a driving sequence of the printing elements in each group; a plurality of AND circuits, provided on the substrate in correspondence with the plurality of printing elements, each outputting a driving signal as a logical product of the first signal and the second signal; and a plurality of driving elements provided on the substrate in correspondence with the plurality of printing elements, each of which drives the corresponding printing element, based on the driving signal, wherein each of the plurality of element selection circuits outputs the first signal to the plurality of AND circuits corresponding to the plurality of printing elements in the corresponding group through a common output line, and wherein a first area, in which one of the plurality of element selection circuits corresponding to one group is arranged, a second area, in which the common output line corresponding to the one group is arranged, and a third area, in which the plurality of AND circuits corresponding to the one group are arranged, are arranged in order in a direction crossing the predetermined direction.