| 摘要 |
The liquid discharge device of the present invention comprises a piezoelectric actuator 11 and a flow passage member 21 . The piezoelectric actuator 11 has a plurality of driving electrodes 15 formed on a piezoelectric ceramic layer 14 , and a plurality of piezoelectric displacement elements 16 disposed longitudinally and laterally with regularity. In the flow passage member 21 , a plurality of liquid compressing chambers 23 are formed with liquid outlet orifices 22 . The piezoelectric actuator 11 is placed on the flow passage member 21 , so that the driving electrodes 15 correspond in position to the liquid compressing chambers 23 . A plurality of piezoelectric displacement elements 16 are disposed longitudinally in N lines (N>=4) and have dot density of not less than 300 dpi in lateral direction. The ratio (B/A) of arrangement interval B between the driving electrodes 15 in longitudinal direction to arrangement interval A between the driving electrodes 15 in lateral direction is 0.95 to 1.5. The minimum distance D between the neighboring driving electrodes 15 is 0.15 A or more, D>=0.15 A. This can suppress cross talk.
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