Patent ID: 6382753
Filing Date: 2002-05-07
Classification: B41J

Abstract:
An ink-jet recording head driving method of driving an ink-jet recording head having a pressure generating device corresponding to a pressure generating chamber communication with a jetting hole and having a specific period (TH) of Helmholtz vibration, said ink-jet recording head driving method comprising:a driving pulse generating step of generating a driving pulse by taking out part of a driving signal having a time length corresponding to one printing cycle and including a plurality of driving pulse waves; and an ink jetting step of jetting an ink particle through the jetting hole by applying the driving pulse to the pressure generating device to drive the pressure generating device for a predetermined operation; wherein the driving signal has a waveform that makes a time interval between a point when a preceding ink jetting step is ended and a point when a succeeding ink jetting step is started is equal to or longer than one period (TH) of the Helmholtz vibration of a meniscus when the driving pulse generating step and the ink jetting step are repeated a plurality of times in one printing cycle to jet a plurality of the ink particles; wherein the driving signal has a waveform that makes a succeeding ink jetting step start after a point of time when a meniscus of ink in the jetting hole is drawn toward the pressure generating chamber to the utmost by the preceding ink jetting step when the driving pulse generating step and the ink jetting step are repeated a plurality of times in one printing cycle to jet a plurality of the ink particles.