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:
Dec. 03, 2019
Filed:
May. 30, 2018
Ricoh Company, Ltd., Tokyo, JP;
Yoshiaki Oshima, Kanagawa, JP;
Noritada Ohi, Saitama, JP;
Katsuyuki Omura, Tokyo, JP;
Masafumi Nagao, Kanagawa, JP;
Naoyuki Ishikawa, Kanagawa, JP;
Seiko Yamamoto, Tokyo, JP;
Masanobu Yamagata, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A position detection device for detecting positions of a non-emitter and an emitter in a detection area includes one or more reflective members disposed around the detection area, illumination light sources to emit light toward the reflective member, light receiving sensors to receive light from the reflective member and light from the light emitter, and a control device to control the illumination light sources and the light emitter. Based on previous detection statuses of the non-light emitter and the light emitter, the control device sets a time ratio of a time of a non-light emitter detection mode to a time of a light emitter detection mode, and sets timings of the non-light emitter detection mode and the light emitter detection mode.