Patent ID: 7896455
Filing Date: 2011-03-01
Classification: B41J

Abstract:
1. An element substrate comprising: a printing element array including a plurality of printing elements and performing a printing operation by an energization, the printing elements being divided into four groups of a first group, a second group, a third group and a fourth group; a plurality of transistors being respectively disposed in correspondence with the printing elements of the printing element array, and controlling ON/OFF for energizing the printing elements based on driving pulse signal; a pair of first electrode pads applying voltage for energizing a plurality of printing elements belonging to the first group and a plurality of printing elements belonging to the second group; a pair of second electrode pads applying voltage for energizing a plurality of printing elements belonging to the third group and a plurality of printing elements belonging to the fourth group; a driving circuit outputting a driving signal for driving the printing elements of the printing element array; an output circuit outputting four different enable signals to the four groups respectively, the four enable signals being used for determining an energization time for energizing the printing elements of the printing element array; and a control circuit outputting the driving pulse signal to the plurality of transistors, the driving plus signal being generated based on the driving signal and the four enable signals, wherein the output circuit outputs the four enable signals to input in the order of the first group, the third group, the second group and the fourth group.