Inkjet Recording Head And Inkjet Recording Apparatus Having The Same
AssigneeCanon Kabushiki Kaisha
InventorsTakatsuna Aoki, Hideo Kanno
Life of this patent
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Abstract
An inkjet recording head includes a passage communicating with a discharge port for discharging ink, a discharging heater provided in the passage for generating energy to discharge ink from the discharge port, and a detecting unit provided in the passage for detecting a temperature of ink that changes in accordance with heat energy generated by the detecting unit and a flow of ink in the passage.
Claims4
1-15. (canceled)
A method of detecting a discharging state of an inkjet head comprising a passage communicating with a discharge port for discharging ink, an energy generating element, provided in the passage, for generating energy to discharge ink from the discharge port, and a detecting unit, provided in the passage, the method comprising:
- applying a pulse current having a predetermined pulse width to the detecting unit so as to heat ink in the passage;
- and
- applying a pulse current having a pulse width smaller than the predetermined pulse width so as to measure a temperature of the ink in the passage.
Dependencies are inferred from the claim text.