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:
Jun. 23, 2015
Filed:
Jun. 07, 2011
Ritsuo Machii, Tokyo, JP;
Ritsuo Machii, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
According to one aspect of the invention, a coordinate input apparatus for calculating a position of an object positioned on an input area comprises: a light projecting unit; retroreflecting members arranged along two opposite sides of a rectangular area including the input area, and having a reflecting surface which reflects the light emitted by the light projecting unit; a light receiving unit; and a calculation unit configured to calculate the position of the object based on a measurement result from the light receiving unit, wherein a set of the light projecting unit and the light receiving unit arranged adjacent to the retroreflecting member to sandwich the retroreflecting member in a direction perpendicular to a surface of the input area are positioned in at least two portions of each of the retroreflecting members arranged on the two opposite sides.