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US 8,474,941 B2Granted
Inkjet printing apparatus and inkjet printing method
AssigneeCanon Kabushiki Kaisha
InventorsHirokazu Tanaka, Hidehiko Kanda, Wakako Yamamoto, Kenichi Oonuki
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Abstract
There are provided an inkjet printing apparatus and an inkjet printing method, whereby, the temperature of a print head is controlled and the ejection volume of ink to be ejected is stabilized to print a high-quality image, even at a high printing duty. Based on print data, an ejection number of ink to be ejected into a unit printing area is counted. The print head is heated to a target temperature that is raised in consonance with an increase in the count value.
Claims7
An inkjet printing apparatus to print an image on a printing medium comprising:
- a print head capable of ejecting ink from a plurality of ejection ports based on print data, the plurality of ejection ports including a plurality of first ejection ports providing a first ejection volume of ink and a plurality of second ejection ports providing a second ejection volume of ink, the second ejection volume being smaller than the first ejection volume;
- a temperature detecting unit that detects a temperature of the print head;
- a heating unit that heats the print head so that the temperature detected by the temperature detecting unit reaches a target temperature;
- and
- a heating control unit that sets the target temperature;
- wherein the heating control unit sets the target temperature in consonance with an increase in a total value obtained by adding a first ejection number of ink to be ejected from the first ejection ports to a value obtained by multiplying a predetermined coefficient by a second ejection number of ink to be ejected from the second ejection ports.
3 more elements
Dependencies are inferred from the claim text.