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:
Nov. 25, 2014
Filed:
Apr. 22, 2013
Kabushiki Kaisha Yaskawa Denki, Kitakyushu-shi, JP;
Yasushi Yoshida, Fukuoka, JP;
Yuji Arinaga, Fukuoka, JP;
Shirou Yoshidomi, Fukuoka, JP;
Yasuhiro Matsutani, Fukuoka, JP;
Kabushiki Kaisha Yaskawa Denki, Kitakyushu-Shi, JP;
Abstract
Reflected light can be effectively utilized by increasing a light receiving area. Incremental light receiving element groups are separated and arranged in the circumferential direction of a rotating unit while placing a light source therebetween. First and second absolute light receiving element groups are arranged at both sides of the outside and inside of the light source in the radial direction of the rotating unit. As a result, first and second absolute light receiving elements are continuously arranged, and also the incremental light receiving element groups and the absolute light receiving element groups can be arranged to surround the periphery of the light source from four directions.