INK JET RECORDING APPARATUS THAT MEASURES CHANGE IN TEMPERATURE AFTER HEATER IS DRIVEN AND DETERMINES DISCHARGE STATE AND METHOD FOR DETERMINING DISCHARGE STATE

摘要

In an ink jet recording apparatus using a recording head that discharges ink by applying thermal energy produced in response to driving a heater to ink, a change in temperature occurring when the heater is driven is measured by a temperature sensor disposed directly below the heater. A discharge state for each nozzle can be determined by determination as to whether an inflection point is present in a curve representing the change in temperature occurring after the driving for discharging ink.