| 摘要 |
<p>A piezoelectric actuator (12) includes first active portion (71-73) which correspond to a central portion of each of pressure chambers (40) and a second active portion (81,82) which correspond to a portion, of each of the pressure chambers (40), located on outer circumferential sides with respect to the central portion of the pressure chamber (40). The first active portion (71-73) and the second active portion (81,82) are deformed by applying the voltage to each of the first and second active portions. The first active portion (71-73) is polarized in a direction parallel to the electric field generated in the first active portion (71-73), and the second active portion (81,82) is polarized in a direction opposite to the electric field generated in the second active portion (81,82), thereby making it possible to suppress the crosstalk even when a high density arrangement of the pressure chambers (40) is realized.</p> |
