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:
Jan. 19, 2016
Filed:
Jul. 24, 2014
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Dai Nippon Printing Co., Ltd., Shinjuku-Ku, JP;
Abstract
A light guide platehas a number of back surface-side unit optical structuresarranged in a back surfacealong a light guide direction. Each back surface-side unit optical structureis tapered in a direction away from a light exit surface, and has a first inclined surfacelying on the light entrance surface side, a second inclined surface () lying opposite the first inclined surface and which totally reflects at least part of incident light, and a top surface regionlying between the first inclined surfaceand the second inclined surface, and located farthest from the light exit surface. The top surface regionseach include a plurality of surfacestowhich are parallel to the light exit surfaceand have different heights 'h' in the direction away from the light exit surface