| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a logic circuit malfunctions in some cases used to occur because of current noise when recording elements are driven in an element substrate which has the recording elements arranged with a high density. SOLUTION: In the element substrate for the recording head which has a plurality of the recording elements and a block selecting part that divides the plurality of recording elements into a plurality of blocks and drives the recording elements for every block in a time sharing manner, the element substrate has a plurality of input terminals which divide the plurality of recording elements included in each block to a plurality of groups and give for each group a driving voltage to the recording elements that belong to each group, a delay circuit which inputs an enable signal to permit energization to the recording elements from the outside and generates a plurality of delay enable signals with different delay times to the enable signal, and a wiring line which supplies the enable signal and the plurality of delay enable signals output from the delay circuit to different groups in order of the different delay times. COPYRIGHT: (C)2008,JPO&INPIT
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