INK JET RECORDING APPARATUS

摘要

PURPOSE:To always perform gradation recording sufficiently and certainly with good efficiency, by changing the quantity of the liquid in a liquid flow passage by a liquid quantity control means and controlling said change or emitting timing. CONSTITUTION:A heating electrode 7 receives the supply of the driving signal from a heating electrode driving apparatus 9 to generate heat and the ink in the vicinity of an orifice is heated in accordance with said driving signal to generate bubbles and emitted from the orifice 3 as a liquid droplet due to the abrupt expansion of the ink 2 to perform dot recording. A high frequency signal oscillator 13 supplies a high frequency signal to an ultrasonic oscillator 5 and a meniscus 8 is allowed to advance/retract in accordance with said signal. A phase shifter 14 is arranged to the heating electrode driving apparatus 9 and controls the timing of the driving signal supplied to the heating electrode is accordance with the position of the meniscus 8. Further, the timing of the pulse voltage applied to the heating electrode 7 is changed with respect to the position of the meniscus by the phase shifter 14 while the ultrasonic oscillator 5 is driven at constant speed to control the diameter of a liquid droplet.