Inkjet printing apparatus and inkjet printing method
AssigneeCanon Kabushiki Kaisha
InventorJun Yasutani
Life of this patent
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Abstract
By performing an average process of a result of a plurality of times of samplings by the temperature sensor provided on a printing element substrate, temperature of the printing element substrate is obtained. In this case, the number of times of samplings is determined on the basis of a simultaneously driven number in the printing element substrate. This enables the number of times of samplings for the temperature sensor to be determined depending on a simultaneously driven number at each time, and therefore while suppressing an influence of noise, the temperature of the printing element substrate can be measured in a highly reliable state where there is no separation from an actual temperature.
Claims11
An inkjet printing apparatus comprising:
- a printing element substrate provided with a printing element array adapted to array a plurality of printing elements ejecting ink by applying a driving pulse, and a temperature sensor;
- a temperature obtaining unit configured to perform an average process of a plurality of output values outputted from the temperature sensor, and thereby obtain a temperature of the printing element substrate;
- and
- an adjustment unit configured to, on a basis of the temperature obtained by the temperature obtaining unit, adjust a shape of the driving pulse to be applied to the printing elements,
- wherein the temperature obtaining unit determines a number of output values used for the average process on a basis of a number of simultaneously driven printing elements on the printing element substrate.
An inkjet printing method of an ink jet printing apparatus which comprises a printing element substrate provided with a printing element array adapted to array a plurality of printing elements ejecting ink by applying a driving pulse, and a temperature sensor, the inkjet printing method comprising:
- a temperature obtaining step of performing an average process of a plurality of output values outputted from the temperature sensor, and thereby obtaining a temperature of the printing element substrate;
- and
- an adjustment step of, on a basis of the temperature of the printing element substrate, the temperature being obtained in the temperature obtaining step, adjusting a shape of the driving pulse to be applied to the printing elements,
- wherein a number of output values used for the average process in the temperature obtaining step is determined on a basis of a number of simultaneously driven printing elements on the printing element substrate.
Dependencies are inferred from the claim text.