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:
Jan. 21, 2020
Filed:
Jun. 08, 2017
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Yasuo Fujii, Hiratsuka, JP;
Kazunari Fujii, Tokyo, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/14 (2006.01); B41J 2/05 (2006.01); B41J 2/045 (2006.01);
U.S. Cl.
CPC ...
B41J 2/14072 (2013.01); B41J 2/0458 (2013.01); B41J 2/04501 (2013.01); B41J 2/04531 (2013.01); B41J 2/04541 (2013.01); B41J 2/05 (2013.01); B41J 2/14088 (2013.01); B41J 2/14112 (2013.01); B41J 2/14129 (2013.01);
Abstract
A liquid discharge head substrate, comprising a discharging element configured to discharge a liquid, a driver configured to drive the discharging element, a conductive protection film covering the discharging element via an insulating film, and a controller connected to the protection film and configured to output a control signal that sets the driver in an inactive state when a change of a voltage of the protection film or a change in a current that flows to the protection film is detected.