Patent ID: 6224193
Filing Date: 2001-05-01
Classification: B41J

Abstract:
An inkjet recording apparatus for recording on a recording medium, the apparatus comprising:an ink chamber for containing ink including particulate matter;a plurality of ejection electrodes arranged in the ink chamber for ejecting ink toward the recording medium, each election electrode having an election end;a gate electrode plate arranged outside the ink chamber and having a plurality of gate electrodes therein, each of the gate electrodes corresponding to a respective one of the ejection electrodes;an opening formed through each gate electrode, wherein each ejection electrode is directed to jet ink particles through the opening of the corresponding gate electrode, such that ink particles ejected from each ejection electrode toward the recording medium pass from the election end of the electrode through the respective opening of the corresponding gate electrode; anda controller for generating a voltage difference between the ejection electrode and the gate electrode, the voltage difference changing between a first value and a second value depending on an input signal, wherein the first value is equal to or greater than a predetermined value and the second value is smaller than the predetermined value, the predetermined value being a minimum value which causes ejection of particulate matter from each ejection electrode.