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. 06, 2019
Filed:
Oct. 05, 2016
Enplas Corporation, Saitama, JP;
Tomohiro Saito, Saitama, JP;
Enplas Corporation, Saitama, JP;
Abstract
A light-emitting device includes: a light emitting element; and a light flux controlling member configured to allow incidence of light from the light emitting element and emit light incident on the light flux controlling member. The light flux controlling member includes an incidence region and an emission region. The incidence region includes a fresnel lens part having a plurality of projected lines formed to surround a central axis of the light flux controlling member. The projected line includes an incidence surface configured to allow incidence of the light from the light emitting element, and a reflecting surface paired with the incidence surface and configured to reflect the light incident on the incidence surface toward the emission region. An angle between the incidence surface and a line parallel to the central axis is greater than an angle between the reflecting surface and a line parallel to the central axis.