Patent ID: 8506056
Filing Date: 2013-08-13
Classification: B41J,H01L

Abstract:
1. A piezoelectric actuator comprising: a vibration plate that is connected to an object at a predetermined connection portion, and that has a deformable portion at a region different from the connection portion; a first piezoelectric layer arranged at one face side of the vibration plate; a second piezoelectric layer arranged at one face of the first piezoelectric layer; and three types of drive electrodes arranged at respective faces of the first piezoelectric layer and the second piezoelectric layer said respective faces not being in contact with each other, so as to be opposed to at least the deformable portion, respectively, wherein the three types of the drive electrodes include: wherein the first piezoelectric layer and the second piezoelectric layer are not sandwiched between the first drive electrode and the second drive electrode at regions opposed to the connection portion, wherein the second drive electrode is arranged between the first piezoelectric layer and the second piezoelectric layer so as to be opposed to a part of the deformable portion, and wherein the first drive electrode is arranged at the other face of the first piezoelectric layer so as to be opposed to a region of the deformable portion which is different from said part, wherein the vibration plate includes a plurality of deformable portions, wherein the second drive electrode includes: wherein the first drive electrode is arranged so as not to be opposed to the connecting portion.