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. 06, 2012
Filed:
Oct. 15, 2008
Hiroaki Shigeta, Osaka, JP;
Masanobu Okano, Osaka, JP;
Hiroaki Shigeta, Osaka, JP;
Masanobu Okano, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A light guide plate has a main-side microprism array sheet (main-side MPA sheet)adhered to the top facethereof, and a sub-side microprism array sheet (sub-side MPA sheet)adhered to the bottom facethereof. A prism formation region of the sub-side MPA sheetis smaller than that of the main-side MPA sheet. Prisms in the prism formation region of the main-side MPA sheetare, in an arrangement where the density of prisms arranged increases with distance from a light source, so arranged that the density of prisms arranged increases in a region that faces the prism formation region of the sub-side MPA sheet