Method of driving ink jet printing head

Details Method of driving ink jet printing head Method of driving ink jet printing head

1992-06-11

1994-10-25

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 68, 347 94, B41J 2055

Patent

active

053593502

ABSTRACT:
An ink jet printing head driving method includes steps of: applying a voltage falling edge of a first pulse signal to cause a piezoelectric element to contract so that a capacity of a liquid passage is increased so as to supply ink to the liquid passage; applying a voltage rising edge of the first pulse signal to cause the piezoelectric element to expand so that the capacity of the liquid passage is decreased, for discharging an ink droplet through a discharge port, the first pulse signal having a first pulse width and a first peak voltage amplitude; and applying a voltage rising edge of a second pulse signal to the piezoelectric element after a predetermined delay time has elapsed since application of the first pulse signal for discharging the ink droplet, a pulse width of the second pulse signal being smaller than the first pulse width, and a peak voltage amplitude of the second pulse signal being equal to the first peak voltage amplitude.

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