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:
Mar. 17, 2015
Filed:
Feb. 25, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Hirokuni Takano, Yoshikawa, JP;
Yuichiro Yoshimura, Yokohama, JP;
Katsuyuki Kobayashi, Yokohama, JP;
Ritsuo Machii, Tokyo, JP;
Takuto Kawahara, Tokyo, JP;
Takayuki Hashimoto, Yokohama, JP;
Naoki Umemura, Abiko, JP;
Hajime Sato, Yokohama, JP;
Takayuki Komine, Kawasaki, JP;
Akihiro Matsushita, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A coordinate input apparatus includes a light projecting unit configured to project light parallelly to an effective coordinate input region, a reflection unit configured to retroreflect the light projected by the light projecting unit, and a light receiving unit configured to receive light from the light projecting unit or the reflection unit. The coordinate input apparatus includes a moving unit configured to move a set of the light projecting unit, light receiving unit, and reflection unit in a direction perpendicular to the effective coordinate input region in order to ensure a light amount with which a pointed position in the effective coordinate input region can be calculated based on variations of a light amount distribution obtained from the light receiving unit.