Patent ID: 8186789

Claim:
An ink jet printing apparatus that uses a print head, which applies an electric pulse to an electro-thermal transducer element to generate a bubble in ink and ejects ink by means of pressure of the bubble, to perform printing, said apparatus comprising: a driving unit for applying the electric pulse, including a pre-heat pulse by which no ink is ejected, a main heat pulse for ejecting ink which is applied after the pre-heat pulse is applied, and a pause period between the pre-heat pulse and the main heat pulse, to the electro-thermal transducer element; and a pulse width control unit for, when temperature related to a viscosity of ink is equal to or lower than a predetermined temperature, causing a width of the pre-heat pulse to be smaller than a width of the pre-heat pulse used when the temperature related to a viscosity of ink is higher than the predetermined temperature.