Patent ID: 7404612
Filing Date: 2008-07-29
Classification: B41J

Abstract:
1. An ink jet printing apparatus configured to print an image by using a printing head capable of ejecting ink by utilizing thermal energy generated upon application of a drive pulse to an electrothermal converter, the printing being performed by applying the ink ejected from the printing head onto a printing medium, the ink jet printing apparatus comprising: acquiring means for acquiring information on a temperature of the printing head; and drive controlling means for controlling a voltage and a pulse width of the drive pulse on the basis of the information, wherein the drive controlling means executes double-pulse-drive control using a pre-heat pulse and a main heat pulse collectively as the drive pulse until the temperature of the printing head reaches a predetermined temperature, and the drive controlling means executes single-pulse-drive control using a single pulse as the drive pulse after the temperature of the printing head exceeds the predetermined temperature, and in the single-pulse-drive control, when the temperature of the printing head is in a first temperature range, a first voltage is used as the voltage of the drive pulse, and when the temperature of the printing head is in a second temperature range higher than the first temperature range, a second voltage higher than the first voltage is used as the voltage of the drive pulse.