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:
Jul. 17, 2018
Filed:
Feb. 16, 2017
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Katsumi Inoue, Shiojiri, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/045 (2006.01); H02P 6/08 (2016.01); H02P 25/06 (2016.01); H02P 6/14 (2016.01);
U.S. Cl.
CPC ...
B41J 2/04541 (2013.01); B41J 2/04586 (2013.01); H02P 6/085 (2013.01); H02P 6/14 (2013.01); H02P 25/06 (2013.01);
Abstract
A motor drive circuit which drives a motor, includes a driving unit that supplies a drive current to the motor on the basis of a control signal, an amplification unit that amplifies a potential difference between a first node of a wire, through which at least a portion of the drive current flows, and a second node of the wire, and a controller that generates the control signal on the basis of comparison between the potential difference amplified by the amplification unit and a threshold voltage.