INK-JET RECORDING APPARATUS

摘要

To provide an ink jet recording apparatus in which the residual vibration of any ink can be prevented to avoid the spread of the ink at an opening portion and to perform the continuous discharge of the ink stably. An ink-jet recording apparatus includes a recording head including a pressure chamber and a nozzle, the pressure chamber containing ink, the nozzle communicating with the pressure chamber and having an opening portion formed therein to discharge the ink, a piezoelectric element forming part of the pressure chamber, and a driving signal producing section producing a driving signal to be input to the piezoelectric element to change the volume of the pressure chamber.

主权项

1. An ink-jet recording apparatus, comprising:
a recording head, including a pressure chamber and a nozzle, the pressure chamber containing an ink, the nozzle communicating with the pressure chamber and the nozzle having an opening portion for discharging the ink; a piezoelectric element, for forming part of the pressure chamber; and a driving signal producing section, for producing a driving signal to be input to the piezoelectric element to change a volume of the pressure chamber, wherein the driving signal producing section produces the driving signal to perform:
a first expansion step of expanding the pressure chamber;a first contraction step of contracting the pressure chamber to discharge the ink after the first expansion step; anda second contraction step of contracting the pressure chamber in a timing in which a meniscus is pulled into a direction opposite to a discharge direction after the first contraction step, and the driving signal output by the driving signal producing section is set such that a potential at an end point of the second contraction step is set to be positioned in a range opposite to a potential at an end point of the first expansion step with respect to a potential at a starting point of the first expansion step, and such that the potential at the starting point of the first expansion step is set to be substantially the same as a potential at a starting point of the second contraction step.