PRINTING HEAD APPARATUS HAVING MALFUNCTION DETECTOR AND MONITOR METHOD OF PRINTING HEAD

摘要

PROBLEM TO BE SOLVED: To provide a printing head having a pressure sensor and a pressure sensor circuit, which can detect internal malfunction and can also detect the clogging of a nozzle and a state of non-ejection and ink-free ejection and judges ink ejection characteristics on the basis of a signal having detected and sensed the ejection of an ink jet mechanism, incorporated therein. SOLUTION: A printing head apparatus is equipped with a substrate, the ink jet mechanism 14 provided on the substrate 12 and first pressure sensors 40, 50 capable of detecting the signal related to the ejection of the ink jet mechanism 14.