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:
Oct. 08, 2013
Filed:
Jan. 25, 2012
Masahiro Gotou, Tokyo, JP;
Hiroshi Sekiguchi, Tokyo, JP;
Hiroshi Yamamoto, Tokyo, JP;
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Abstract
A light guide plate shaped substantially like a plate includes a light incident surface, a light exit surface and a reflective surface, which is opposite to the light exit surface, configured to reflect light toward the light exit surface. A plurality of optical units is arranged along the reflective surface in a direction orthogonal to the light incident surface. Each optical unit is shaped substantially like a quadratic prism that is convex toward the reflective surface and has a top surface and two slopes being formed opposite to each other with respect to the top surface. A dimension of the top surface is constant in a direction of arrangement of the optical units and an interval between adjacent optical units becomes greater as the adjacent optical units lie further away from the light incident surface in the direction of arrangement of the optical units.