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:
May. 01, 2012
Filed:
Sep. 10, 2008
Masayuki Katsumata, Kawasaki, JP;
Azusa Shiratori, Tokyo, JP;
Shuuichi Shimoda, Tokyo, JP;
Masami Tabata, Naka-gun, JP;
Masayuki Katsumata, Kawasaki, JP;
Azusa Shiratori, Tokyo, JP;
Shuuichi Shimoda, Tokyo, JP;
Masami Tabata, Naka-gun, JP;
Canon Components, Inc., Saitama-Ken, JP;
Abstract
Conventional methods using two optical waveguide members are disadvantageous in cost because they require two optical waveguide members and pairs of their associated components. A linear lighting apparatus includes a rod-like optical waveguide member () formed by a transparent material, a light source placed near an end face of the optical waveguide member () in the longitudinal direction, and a light exit surface () formed on at least part of the optical waveguide member () in the longitudinal direction. A cross section of the optical waveguide member in the widthwise direction has a plurality of reflecting areas () at positions to face a light exit surface () and a barrier () at a boundary portion between the reflecting areas ().