Ink jet recording apparatus and method with modulatable driving pulse width

摘要

An ink jet recording apparatus in which thermal energy is applied to ink in accordance with a driving signal applied to a heater to produce a bubble, by which ink is ejected onto a recording material includes a driver for applying a plurality of driving signals to the heater for one ejection of ink droplet, wherein the driving signals comprises a first driving signal not ejecting the ink and a second driving signal for ejecting the ink, the second driving signal is applied after a rest period after the first driving signal; a controller for changing an amount of ink ejected by changing a length of the rest period and changing the first driving signal; wherein the controller effects its changing operation in a first changing region in which the rest period is changed without changing the first driving signal and in a second changing region in which a length of the first drive signal is changed. $$