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:
Aug. 15, 2017
Filed:
Jul. 17, 2013
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Nobuhiro Kasai, Osaka, JP;
Sharp Kabushiki Kaisha, Sakai, JP;
Abstract
A display deviceincludes a display panel, a light source row, a light guide plate, a chassisand a recess portionthat is fitted the chassis. The light guide plateincludes a positioning projection portionthat is fitted to the recess portion. The positioning projection portionprojects outwardly from a side edge surfaceof the light guide plate. The positioning projection portionhas a projection, and among rays of light emitted from an end light sourceX included in the light source rowand entering the light guide plate through a light entrance surface, narrow-angle light Ldirected outward at an angle α (a critical angle θc) with respect to an optical axis Lenters the projection. The positioning projection portionincludes a first edge surfaceand a second edge surface. The first edge surfaceis parallel to a side edge surfaceand the narrow-angle light Lreaches the first edge surface. The second edge surfaceis between the side edge surfaceand the first end surfaceand is inclined such that an external angle β between the first edge surfaceand the second edge surfaceis equal to or smaller than the critical angle θc.