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US 2026/0054477 A1Published application
Liquid ejection apparatus and control method
AssigneeCanon Kabushiki Kaisha
InventorsYURIKA KUROGI, YOSHIHIRO HAMADA, FUMI TANAKA, YUZURU ISHIDA, KOICHI ISHIDA, KEIJI TOMIZAWA, SHUZO IWANAGA, YUJI NUKUI, YUGO YAMAMOTO
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Abstract
Provided is a technique capable of obtaining stable ejection characteristics. For this purpose, as a potential difference between an electrode 121 and a counter electrode 129 in an aging process, different potential differences ΔVa are used for a brand-new liquid ejection head and a liquid ejection head having undergone a kogation removal operation.
Claims13
A liquid ejection apparatus on which an ejection unit is mountable,
- the ejection unit including
- a heating resistor configured to generate heat with power supply, thereby generating energy for ejecting a liquid,
- a first electrode provided in a protective portion that covers and protects the heating resistor, and
- a second electrode capable of electrically connecting with the first electrode via the liquid,
- the liquid ejection apparatus comprising a control unit configured to control the mounted ejection unit, wherein
- the control unit is capable of executing an aging process of causing the ejection unit to eject the liquid, thereby accumulating kogation on the first electrode, and a kogation removal process of applying a voltage between the first electrode and the second electrode, thereby dissolving a surface of the first electrode into the liquid and removing the accumulated kogation, and
- in the aging process, the control unit sets, as a potential difference applied between the first electrode and the second electrode, different potential differences in a case where the ejection unit has undergone the kogation removal process and a case where the ejection unit is yet to undergo the kogation removal process.
4 more elements
A control method of a liquid ejection apparatus on which an ejection unit is mountable,
- the ejection unit including
- a heating resistor configured to generate heat with power supply, thereby generating energy for ejecting a liquid,
- a first electrode provided in a protective portion that covers and protects the heating resistor, and
- a second electrode capable of electrically connecting with the first electrode via the liquid,
- the method comprising:
- an aging step of causing the ejection unit to eject the liquid, thereby accumulating kogation on the first electrode;
- and
- a kogation removal step of applying a voltage between the first electrode and the second electrode, thereby dissolving a surface of the first electrode into the liquid and removing the accumulated kogation, wherein
- in the aging step, as a potential difference applied between the first electrode and the second electrode, different potential differences are set in a case where the ejection unit has undergone the kogation removal step and a case where the ejection unit is yet to undergo the kogation removal step.
6 more elements
Dependencies are inferred from the claim text.