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:
Sep. 01, 2020
Filed:
Sep. 27, 2018
Seiko Epson Corporation, Tokyo, JP;
Takayuki Kondo, Chino, JP;
Daiki Tokushima, Azumino, JP;
Seiko Epson Corporation, , JP;
Abstract
An encoder includes a base portion, a scale portion that is provided to be relatively movable or rotatable with respect to the base portion, and has three or more marks which are different from each other, an imaging element that is disposed in the base portion, and images the marks, and an estimation portion that selects at least one reference image from among three or more reference images, performs template matching on a captured image in the imaging element by using the reference image, so as to detect positions of the marks, and estimates a movement state or a rotation state of the scale portion with respect to the base portion, in which the estimation portion predicts a reference image to be used for post-template matching on the basis of a result of pre-template matching, and performs the post-template matching by using the predicted reference image.