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(11) | EP 3 045 314 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | INSPECTION METHOD OF LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE DEVICE |
(57) Inspection processing is performed. The inspection processing includes a first driving
step of driving a piezoelectric element (18a) corresponding to an inspection target
nozzle (23a), a first detection step of detecting vibration that is generated in ink
in a pressure chamber (20) corresponding to the inspection target nozzle by the driving
in the first driving step, a second driving step of driving together the piezoelectric
element corresponding to the inspection target nozzle and a piezoelectric element
(18b) corresponding to at least one nozzle (23b) of nozzles adjacent to the inspection
target nozzle, a second detection step of detecting vibration that is generated in
the ink in the pressure chamber corresponding to the inspection target nozzle by the
driving in the second driving step, and a separation detection step of detecting separation
of a member (15, 16) joined to the partition wall (13) of the pressure chamber based
on a difference between a detection result of the first detection step and a detection
result of the second detection step.
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