| 摘要 |
PROBLEM TO BE SOLVED: To provide a head substrate capable of reducing a power loss and achieving a high integration degree or miniaturizing at a low cost. SOLUTION: The head substrate includes at least a plurality of printing elements, a plurality of driving elements which drive the plurality of printing elements and a plurality of booster circuits which boost the voltage of a driving signal for driving the plurality of driving elements, to a voltage enough to drive the respective driving elements. The head substrate further includes a plurality of voltage generation circuits, arranged close to each other on the head substrate for applying a common voltage for the boosting operation of the booster circuits belonging to each group prepared by grouping the plurality of booster circuits. The plurality of voltage generation circuits share a reference voltage generation part for generating a reference voltage for determining voltage values generated by the plurality of voltage generation circuits. COPYRIGHT: (C)2008,JPO&INPIT
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