Patent attributes
A droplet ejection device includes: a substrate having first, second, third & fourth pressure chambers extending in a first direction; a nozzle plate below the substrate & having first, second, third & fourth nozzle apertures continuous with first, second, third & forth pressure chambers, respectively; a vibration plate above the substrate; first, second, third & fourth piezoelectric elements above the vibration plate & above first, second, third & fourth pressure chambers. wherein, viewed in a second direction orthogonal to the first direction, the first nozzle aperture positioned to overlap the third nozzle aperture & doesn't overlap the second & fourth nozzle apertures; the second nozzle aperture overlaps the fourth nozzle aperture & doesn't overlap the first & third nozzle apertures, viewed in the second direction; the first piezoelectric element positioned to overlap the third piezoelectric element & doesn't overlap the second & fourth piezoelectric elements, viewed in the second direction; & the second piezoelectric element overlaps the fourth piezoelectric element & doesn't overlap the first & third piezoelectric elements.
