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:
Dec. 07, 2004
Filed:
Mar. 11, 2002
Yoshinori Suga, Yokkaichi, JP;
Other;
Abstract
A planar light source device including a light guide pipe with one surface thereof serving as a light radiation surface, a light extracting mechanism provided to the light guide pipe, a light source provided to a side edge portion of the light guide pipe, and a light reflection sheet arranged to an opposite surface side from the light radiation surface of the light guide pipe such that the light extracting mechanism serves as a mechanism for radiating out, toward the light reflection sheet side, at least 65% or more of light beams radiated out from the light guide pipe, and the light reflection sheet is formed with an arrangement of multiple substantially identical and/or substantially similar base units composed of sloped reflection surfaces at a pitch of 5000 &mgr;m or less.