Patent ID: 8408673
Filing Date: 2013-04-02
Classification: B41J

Abstract:
1. A printing apparatus adapted to print on a printing medium by discharging ink comprising: an inkjet printhead having the plurality of nozzles for discharging ink, a plurality of electrothermal transducers arranged in correspondence with the respective nozzles, for generating thermal energy used for discharging ink from the respective nozzles, and a plurality of sensors for detecting temperatures in correspondence with the respective electrothermal transducers; and an identifying unit configured to identify statuses of the respective nozzles by comparing the respective temperatures detected by the plurality of sensors with a plurality of threshold values indicating a plurality of nozzle statuses at a first timing after a predetermined period of time from a start of applying a voltage pulse to the respective electrothermal transducers, wherein the plurality of threshold values are determined based on an initial temperature of the ink printhead at a second timing before applying the voltage pulse and a driving condition of the inkjet printhead.