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. 03, 2017
Filed:
Feb. 11, 2015
Canon Precision Inc., Hirosaki-shi, JP;
Ryo Sasaki, Yokohama, JP;
CANON PRECISION, INC., Aomori-Ken, JP;
Abstract
An encoder includes a scale including an origin detecting pattern, an origin detector, and a processor. The origin detector includes a plurality of detecting element groups including a first, second, third, and fourth detectors. The first and second detectors and the third and fourth detectors are symmetrically arranged to a center of each detecting element group, respectively. A part of the origin detecting pattern having a physical characteristic different from an origin peripheral part is shorter than each detecting element group. The origin detector outputs a first signal from the first and third detectors, and a second signal from the second and fourth detectors. The processor outputs a fifth signal based on a third signal from the first signal and a first threshold, and a fourth signal from the second signal and a second threshold as an origin signal.