Patent ID: 8075101

Claim:
A method for driving a recording head including a plurality of electrothermal transducers associated with temperature sensing elements disposed above or below the electrothermal conversion elements, the method comprising: supplying driving energy to the electrothermal transducer; acquiring temperature information from the temperature sensing element; calculating a second-order differential value based on the obtained temperature information acquired from the temperature sensing element; evaluating a temperature change in a temperature fall interval, occurring after supplying of driving energy to the electrothermal transducer, based on a calculation result of calculating a second-order differential value based on the obtained temperature information; changing an amount of the driving energy supplied to the electrothermal transducer; determining an energy value for driving the electrothermal transducer based on the evaluated temperature change and an energy value supplied to the electrothermal transducer; and recording data on a recording medium by driving the electrothermal transducer according to the determined energy value.