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. 02, 2024
Filed:
Dec. 22, 2022
Kabushiki Kaisha Yaskawa Denki, Kitakyushu, JP;
Hiroshi Takada, Kitakyushu, JP;
Yasushi Yoshida, Kitakyushu, JP;
Shiro Yoshidomi, Kitakyushu, JP;
Masanobu Harada, Kitakyushu, JP;
Yasuhiro Matsutani, Kitakyushu, JP;
Daisuke Furukawa, Kitakyushu, JP;
KABUSHIKI KAISHA YASKAWA DENKI, Kitakyushu, JP;
Abstract
An encoder includes a scale and a sensor. The scale has first and second absolute patterns. The sensor includes a light source, and first and second absolute light receivers. The first and second absolute light receivers receive light from the first and second absolute patterns, respectively. The first absolute light receiver receives light from the first pattern and includes first and second light receiving elements. Each first light receiving elements outputs a first signal with a first phase. Each second light receiving elements outputs a first signal with a second phase. The first and second light receiving elements are arranged alternately. The second absolute light receiver includes third and fourth light receiving elements. Each third light receiving element outputs a second signal with the first phase. The third and fourth light receiving elements are arranged alternately. Each fourth light receiving element outputs a second signal with the second phase.