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:
Jul. 16, 2019
Filed:
Dec. 03, 2015
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
SHARP KABUSHIKI KAISHA, Sakai, Osaka, JP;
Abstract
A lighting device includes LEDs, and a light guide plateincluding an edge surface and a pair of plate surfaces, a part of the edge surface being a light entrance surfaceB through which light from the LEDsenters, and one of the plate surfaces being a light exit surfaceA through which the light exits and another one of the plate surfaces being an opposite plate surfaceC opposite from the light exit surfaceA. The light guide plateincludes prism portionson the opposite plate surfaceC, projecting from the opposite plate surfaceC and arranged in the X-axis direction and configured to collect light toward in a normal direction of the light exit surfaceA, and an exit light reflection portionprovided in a recessed portionthat is formed by two adjacent prism portionsand configured to reflect light travelling within the light guide plateand facilitate exiting of light from the light guide plate