Patent ID: 9073310
Filing Date: 2015-07-07
Classification: B41J

Abstract:
1. A printing element substrate comprising: a plurality of printing elements, which are arrayed in a predetermined direction, forming a plurality of groups; a first generating unit configured to generate a threshold signal which is set for each of the plurality of groups and a ramp signal, based on an externally received digital signal; and second generating units, which are arranged in correspondence with the respective groups, configured to generate, based on the ramp signal and the threshold signal, enable signals for setting a period during which the printing element is driven, wherein the first generating unit includes a D/A converter, which is configured to convert a digital signal into an analog signal, arranged between the plurality of printing elements and an outer edge of the substrate in the predetermined direction, and wherein the second generating units include a plurality of comparators which are arranged in correspondence with the respective groups and along the predetermined direction.