公开(公告)号：US20230007995A1

公开(公告)日：2023-01-12

申请号：US17858162

申请日：2022-07-06

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoshihiro Hamada ,  Tomoki Ishiwata ,  So Aizawa ,  Keiji Tomizawa

IPC: B41J2/045 ,  B41J2/14

Abstract: An aspect of the present disclosure is a liquid ejection apparatus including: a liquid ejection head including a conversion element that generates energy required to eject liquid, a first protection layer that blocks contact between the conversion element and the liquid, a second protection layer that partially covers the first protection layer and functions as a first electrode, a second electrode that is electrically connected to the first electrode through the liquid, and an ejection port that ejects the liquid, and a control unit configured to control a potential difference between the first electrode and the second electrode in printing to a predetermined value by changing at least one of potentials of the first electrode and the second electrode. The control unit sets the potential difference based on at least one of a condition and a configuration of the liquid ejection head.

公开(公告)号：US12145359B2

公开(公告)日：2024-11-19

申请号：US17858162

申请日：2022-07-06

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoshihiro Hamada ,  Tomoki Ishiwata ,  So Aizawa ,  Keiji Tomizawa

IPC: B41J2/045 ,  B41J2/14

Abstract: An aspect of the present disclosure is a liquid ejection apparatus including: a liquid ejection head including a conversion element that generates energy required to eject liquid, a first protection layer that blocks contact between the conversion element and the liquid, a second protection layer that partially covers the first protection layer and functions as a first electrode, a second electrode that is electrically connected to the first electrode through the liquid, and an ejection port that ejects the liquid, and a control unit configured to control a potential difference between the first electrode and the second electrode in printing to a predetermined value by changing at least one of potentials of the first electrode and the second electrode. The control unit sets the potential difference based on at least one of a condition and a configuration of the liquid ejection head.

公开(公告)号：US12053979B2

公开(公告)日：2024-08-06

申请号：US17883701

申请日：2022-08-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： So Aizawa ,  Keiji Tomizawa ,  Tomoki Ishiwata

IPC: B41J2/045 ,  B41J2/14

CPC classification number: B41J2/04508 ,  B41J2/0458 ,  B41J2/04596 ,  B41J2/14129

Abstract: An aspect of the present invention is a liquid ejection apparatus including: a liquid ejection head including a heating element, a first protection layer, a second protection layer that functions as a first electrode, a second electrode that is electrically connected to the first electrode, and an ejection port; and a control unit configured to perform control of setting a potential difference between potentials of the first and second electrodes to a predetermined value by changing at least one of the potentials of the first electrode and the second electrode, in which the control unit sets the potential difference to a first value in a case where printing is performed, and the control unit sets the potential difference to a second value different from the first value and feeds power to at least one of a plurality of the heating elements in a case where printing is not performed.