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. 09, 2019
Filed:
Oct. 29, 2015
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
SHARP KABUSHIKI KAISHA, Sakai, Osaka, JP;
Abstract
A lighting device includes a light source emitting light having an orientation distribution around an optical axis, a light guide plate having a hole and including a light entrance surface, a light exit surface, a non-light exit portion, and a light receiving surface, and a reflecting portion. The light entrance surface is opposite the light source such that the optical axis overlaps the hole. The non-light exit portion is the hole and surrounded by the light exit surface. The light receiving surface is next to the light entrance surface and near the non-light exit portion and receives maximum inclination light including light inclined at a largest angle with respect to the optical axis in a plan view. The reflecting portion is arranged opposite the light receiving surface and reflects the maximum inclination light from the light receiving surface toward the non-light exit portion.