| 摘要 |
<p>An apparatus and method of detecting a missing nozzle in an ink jet print head can detect a missing nozzle with a simple process when the missing nozzle is generated. The method of detecting the missing nozzle used in the ink jet print head provided with plural chambers (21 a) in which an ink is filled, plural heaters (11) to heat the ink in the chambers (21a), and plural nozzles (31) corresponding to the heaters (11), includes detecting a temperature of each of the heaters (11), and when the detected temperature deviates from a predetermined temperature range, determining that the nozzle corresponding to the heater is the missing nozzle.
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