Invention Grant
- Patent Title: Light-emitting device
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Application No.: US15285595Application Date: 2016-10-05
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Publication No.: US10371353B2Publication Date: 2019-08-06
- Inventor: Tomohiro Saito
- Applicant: Enplas Corporation
- Applicant Address: JP Saitama
- Assignee: Enplas Corporation
- Current Assignee: Enplas Corporation
- Current Assignee Address: JP Saitama
- Agency: Brundidge & Stanger, P.C.
- Priority: JP2015-202090 20151013
- Main IPC: F21V5/04
- IPC: F21V5/04 ; F21V9/00 ; F21V7/00 ; F21V13/04 ; G02B3/00 ; G03B15/03 ; F21Y115/10

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.
Public/Granted literature
- US20170102125A1 LIGHT-EMITTING DEVICE Public/Granted day:2017-04-13
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