The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2013
Filed:
Aug. 27, 2010
Takatsuna Aoki, Yokohama, JP;
Hiroshi Takabayashi, Atsugi, JP;
Seiichiro Karita, Toda, JP;
Isao Hayashi, Kawasaki, JP;
Takatsuna Aoki, Yokohama, JP;
Hiroshi Takabayashi, Atsugi, JP;
Seiichiro Karita, Toda, JP;
Isao Hayashi, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A printing apparatus and ink discharge failure detection method capable of precisely detecting temperature information corresponding to each nozzle are provided. Temperatures of respective electrothermal transducers (heaters) are measured on the basis of outputs from a plurality of sensors corresponding to the respective heaters. The temperatures of the heaters at a predetermined timing during a printing operation are predicted on the basis of the temperature change profiles of the respective heaters that are generated by energizing the heaters. A plurality of thresholds corresponding to nozzle states are generated on the basis of the predicted temperatures and the driving conditions of an inkjet printhead, and it is controlled to execute temperature measurement at the predetermined timing. A temperature measured under the control is compared with the respective generated thresholds, and the nozzle state is identified on the basis of the comparison results.