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:
May. 12, 2020
Filed:
Nov. 06, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Fumika Nakajima, Moriya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image reading apparatus comprises a driving control part which detects a driving abnormality of a motor which drives a moving unit configured to be movable. Further, the image reading apparatus comprises a HP sensor an output of which changes in accordance with a position of the moving unit, and a CPU(A) which moves the moving unit by controlling operation of the motor based on the output change of the HP sensor. The CPU(A) determines that a driving abnormality occurs in a case where the driving control part detects an abnormality while moving the back surface glass unit. The CPU(A) determines that a position detection abnormality occurs if the output of the HP sensor does not change even when the moving unit is moved by a predetermined distance (ON reference moving amount and OFF reference moving amount) or more in a state where no abnormality is detected by the driving control part.