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:
Sep. 20, 2011
Filed:
Aug. 05, 2009
Yusuke Shimizu, Ibaraki, JP;
Sakura Toshikawa, Ibaraki, JP;
Yusuke Shimizu, Ibaraki, JP;
Sakura Toshikawa, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Abstract
An optical touch panelincludes: a coordinate input region; a light-emitting elementwhich emits light in a near-infrared region; a light-receiving elementwhich receives light in visible and near-infrared regions; a light-emitting sided-optical waveguideconnected to the light-emitting elementand having an output end; and a light-receiving sided-optical waveguideconnected to the light-receiving elementand having an input end. The output endof the light-emitting sided-optical waveguideand the input endof the light-receiving sided-optical waveguideare located on opposite sides of the coordinate input region. The light-receiving sided-optical waveguidehas an organic colored layerprovided on at least part of a surface thereof. The organic colored layerhas a lower light transmittance in a visible light region than in a near-infrared region.