ELEMENT SUBSTRATE, PRINTHEAD, AND PRINTING APPARATUS

摘要

An element substrate capable of suppressing occurrence of electromagnetic noise upon driving printing elements on an element substrate with long wiring lengths, preventing an operation error, and printing a high-quality image is provided. In the element substrate, plural element substrates each including printing elements are arrayed in an arrayed direction of the printing elements. Each element substrate including a wiring for supplying a driving power to drive the printing elements, and a ground wiring from the printing elements is configured as follows. Each element substrate includes a delay circuit for delaying a heat enable signal to drive the printing elements and supplying it to each printing element, and a switchover circuit for switching over, in accordance with a control signal, a delay sequence when supplying the heat enable signal to each printing element.

主权项

1. An element substrate comprising:
a plurality of printing elements configured to generate energy to be used to discharge liquid; a first delay buffer group formed by series-connecting a plurality of buffer circuits in which a heat enable signal to be used to drive the printing element is transferred while being delayed by the plurality of buffer circuits; a second delay buffer group formed by series-connecting a plurality of buffer circuits in which the heat enable signal is transferred while being delayed by the plurality of buffer circuits in a direction different from an arrayed direction of the plurality of buffer circuits of the first delay buffer group; a switchover circuit configured to switch over, in accordance with a control signal, a delay sequence in a case where supplying the heat enable signal to each of the plurality of printing elements by switching over between the first delay buffer group and the second delay buffer group.