Liquid ejection apparatus and method of controlling the same
AssigneeCanon Kabushiki Kaisha
InventorsAkira Goto, Keiji Tomizawa
Life of this patent
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Abstract
A liquid ejection apparatus that includes a cartridge containing liquid and a heat resistor generating heat to eject the liquid and that forms an electric field by a first electrode, which is a part of a protective layer protecting a surface of the heat resistor, and a second electrode corresponding to the first electrode with the liquid interposed therebetween, includes: a reading unit that reads cartridge information from a storage unit of the cartridge; and a determination unit that determines an electric potential difference between electric potential of the first electrode and electric potential of the second electrode according to the cartridge information.
Claims8
A liquid ejection apparatus that includes a cartridge containing liquid and a heat resistor generating heat to eject the liquid and that forms an electric field by (1) a first electrode, which is a part of a protective layer protecting a surface of the heat resistor, and (2) a second electrode corresponding to the first electrode with the liquid interposed therebetween, the liquid ejection apparatus comprising:
- a reading unit configured to read cartridge information from a storage unit of the cartridge;
- and
- a determination unit configured to determine an electric potential difference between electric potential of the first electrode and electric potential of the second electrode according to the cartridge information,
- wherein the cartridge information includes at least one of an ink type, physical properties of ink, manufacturing date, manufacturing lot of the ink, cartridge capacity, and mounting information in a main body of the cartridge, and
- wherein the mounting information in the main body includes a mounting time obtained by subtracting mounting date and time of the cartridge from current date and time at which applying of the electric field ends.
A liquid ejection apparatus that includes a cartridge containing liquid and a heat resistor generating heat to eject the liquid and that forms an electric field by (1) a first electrode, which is a part of a protective layer protecting a surface of the heat resistor, and (2) a second electrode corresponding to the first electrode with the liquid interposed therebetween, the liquid ejection apparatus comprising:
- a reading unit configured to read cartridge information including manufacturing date of the cartridge and mounting date and time of the cartridge from a storage unit of the cartridge;
- and
- a determination unit configured to determine an electric potential difference between electric potential of the first electrode and electric potential of the second electrode according to a combined time of (1) a distribution time obtained by subtracting the manufacturing date from the mounting date and time of the cartridge and (2) a mounting time obtained by subtracting the mounting date and time of the cartridge from current date and time at which applying of the electric field ends.
A liquid ejection apparatus that includes a cartridge containing liquid and a heat resistor generating heat to eject the liquid and that forms an electric field by (1) a first electrode, which is a part of a protective layer protecting a surface of the heat resistor, and (2) a second electrode corresponding to the first electrode with the liquid interposed therebetween, the liquid ejection apparatus comprising:
- a measurement unit configured to measure physical properties of the liquid;
- and
- a determination unit configured to determine an electric potential difference between electric potential of the first electrode and electric potential of the second electrode according to the physical properties of the liquid measured by the measurement unit,
- wherein the physical properties of the liquid are electric conductance or permittivity of ink, and
- wherein the measurement unit calculates the permittivity of the ink by measuring an electrostatic capacitance between the first electrode and the second electrode.
Dependencies are inferred from the claim text.