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:
Aug. 04, 2009
Filed:
Oct. 06, 2006
Daijiro Kodama, Mihara, JP;
Masahiro Goto, Mihara, JP;
Wataru Tokuhara, Hiroshimaken, JP;
Dai Nippon Printing Co., Ltd., Shinjuku-Ku, JP;
Abstract
The present invention is a light-controlling sheet for making light emitted from light sources uniform and/or converging the light. The light-controlling sheet includes a lens part having a large number of rod-like unit lenses arranged in parallel, with a lens surface of each unit lens facing to the light-exiting side. A cross section of the lens surface of each rod-like unit lens taken perpendicularly to the longitudinal direction of the unit lens is asymmetrical. The lens surface of each unit lens has a flat surface part in the shape of a flat surface, and a curved surface part in the shape of part of a cylindrical surface.