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:
Mar. 29, 2011
Yasushi Ishida, Tokyo, JP;
Hiroshi Ogushi, Shiroi, JP;
Noboru Shimoyama, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A touch panel includes a ring-like shaped light-transmissive portion. A ring-shaped diffusion surface is formed on the bottom surface of a light guide element. The ring-like shape includes a second region provided at a location corresponding to two light sources adjacent to a first region corresponding to one light source. A distance from a location of the ring-shaped light-transmissive portion to a periphery of the ring close to the light source is greater in the second region than in the first region. Light emitted from the light source and incident to the light guide element is diffusion-reflected on the diffusion surface and a part of the diffusion-reflected light illuminates the light-transmissive portion.