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. 31, 2017
Filed:
Feb. 22, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Hideo Kanno, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus for inspecting a liquid discharge head including an energy generation element provided on an element substrate and configured to make energy act on a liquid to discharge the liquid from an orifice, a lower protection film having an electrical insulating property and provided on the element substrate while covering the energy generation element, a wiring layer provided between the element substrate and the lower protection film and configured to supply electrical signal for driving to the energy generation element, and a conductive upper protection film provided on the lower protection film is provided. The apparatus comprises a detection circuit configured to detect a potential of the upper protection film when the energy generation element is driven; and a determination circuit configured to determine a driving state of the energy generation element from information about the potential detected by the detection circuit.