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:
Jul. 29, 2014
Filed:
Oct. 28, 2011
Katsuyuki Kobayashi, Yokohama, JP;
Yuichiro Yoshimura, Yokohama, JP;
Katsuyuki Kobayashi, Yokohama, JP;
Yuichiro Yoshimura, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A coordinate input apparatus includes retroreflecting units at two opposite sides of a rectangular-shaped coordinate input effective region, and a plurality of sensor units provided at the two sides. Each of the sensor units includes a light receiving unit for receiving light that reaches the light receiving unit, a light projecting unit for projecting light toward a retroreflecting unit provided at one of the two sides, which opposes the light projecting unit, and a surface light emitting unit for emitting even diffused light from a band-shaped surface. Each of the sensor units simultaneously detects, by the light receiving unit, light that has been projected by the light projecting unit and reflected back by the retroreflecting unit at the side opposing the light projecting unit, and light that has been emitted by surface light emitting units of a plurality of sensor units at the side opposing the light projecting unit.