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:
Nov. 11, 2014
Filed:
Jun. 14, 2012
Masaya Adachi, Hitachi, JP;
Akiyoshi Tobe, Oamishirasato, JP;
Yasuhisa Shiraishi, Mobara, JP;
Japan Display Inc., Tokyo, JP;
Abstract
A lighting device includes a light source, a light guideprovided adjacent to the light sourceand including a light source light incident surfaceon which light emitted by the light sourceenters and a planar light emission surfacefrom which planar light is emitted, and an optical sheetincluding a planar light incident surfaceon which the planar light enters, and configured to change a traveling direction of the planar light because a light emission side of the optical sheethas a shape in which plural columnar prismsextending in parallel to the light source light incident surfaceare arranged side by side. In each of the prisms, a distal surface has at least different two kinds of inclination angles.