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:
Feb. 07, 2012
Filed:
Dec. 25, 2006
Hideki Sawada, Kyoto, JP;
Norihiro Imamura, Kyoto, JP;
Motoari Shoji, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A light guide member of the present invention is made of a light transmitting material. The light guide includes a light emitting surface, which extends in direction x and includes a lens surfacefor converging light in direction y. The light guide also includes a light incident surfaceprovided at one of the ends spaced from each other in the direction x. The light emitting surfaceincludes a transitional regionadjacent to the light incident surface, where the transitional region includes the lens surfaceand a round pillar surface. In the transitional region, the lens surfacebecomes less dominant in area as proceeding in the direction x toward the light incident surface