Recording head and recording apparatus, and inspection apparatus of recording head and method thereof
AssigneeCanon Kabushiki Kaisha
InventorsHiroshi Takabayashi, Takatsuna Aoki
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Abstract
A temperature detection circuit acquires first temperature data detected by a temperature sensor corresponding to a heater of a recording head in a state in which no electric current is flowed into the heater, and second temperature data for the heater in a state in which an electric current is flowed into the heater. Correction data for correcting the temperature data detected by the temperature sensor is obtained based on the first and second temperature data. The temperature data detected by the temperature sensor is corrected based on the correction data.
Claims12
A method of inspecting a recording head for affecting ink with thermal energy from an electrothermal transducer to discharge the ink via a nozzle, the method comprising:
- flowing an electric current into a first electrothermal transducer and acquiring temperature data detected by a temperature sensor that is arranged in the recording head in correspondence with the first electrothermal transducer;
- detecting a first timing when the acquired temperature data reaches a peak temperature;
- detecting a second timing when a temperature change arises in conjunction with a shrinkage in a bubble that has emerged;
- setting each threshold for serving as a reference for determining whether or not a malfunction occurs at the first and second timings;
- and
- determining a driving status of the first electrothermal transducer based on the temperature data detected at the first and second timings by the temperature sensor corresponding to the first electrothermal transducer.
A device for inspecting a recording head for affecting ink with thermal energy from an electrothermal transducer to discharge the ink via a nozzle, the device comprising:
- a measurement unit configured to flow an electric current into a first electrothermal transducer and acquire a temperature data detected by a temperature sensor that is respectively positioned in the recording head in correspondence with the first electrothermal transducer;
- a first detection unit configured to detect a first timing when the acquired temperature data reaches a peak temperature;
- a second detection unit configured detect a second timing when a temperature change arises in conjunction with a shrinkage in a bubble that has emerged;
- a setting unit configured to set each threshold for serving as a reference for determining whether or not a malfunction occurs at the first and second timings;
- and
- a determination unit configured to determine a driving status of the first electrothermal transducer, based on the temperature data detected at the first and second timings by the temperature sensor corresponding to the first electrothermal transducer.
Dependencies are inferred from the claim text.