Invention Grant
- Patent Title: Light flux control member, light-emitting device, surface light source device and display device
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Application No.: US15765520Application Date: 2016-10-03
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Publication No.: US10466533B2Publication Date: 2019-11-05
- Inventor: Kensuke Hiraka
- 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: JP2015-199452 20151007; JP2016-168310 20160830
- International Application: PCT/JP2016/079271 WO 20161003
- International Announcement: WO2017/061370 WO 20170413
- Main IPC: F21V5/00
- IPC: F21V5/00 ; F21V5/04 ; G02F1/1335 ; F21S2/00 ; G02B19/00 ; H01L33/58 ; G02B5/02 ; H01L25/075

Abstract:
This light flux control member has an incidence surface and an emission surface. The emission surface includes a first emission surface projecting toward the back side and disposed so as to cross the central axis, and a second emission surface projecting toward the front side and disposed so as to surround the first emission surface. When the light-emitting element is disposed so as to face the recessed part such that a light emission center thereof is located on the central axis, and a surface to be irradiated is disposed above the emission surface so as to lie at right angles to the central axis, a second maximum value calculated by a predetermined expression is larger than a first maximum value calculated by a predetermined expression.
Public/Granted literature
- US20190033660A1 LIGHT FLUX CONTROL MEMBER, LIGHT-EMITTING DEVICE, SURFACE LIGHT SOURCE DEVICE AND DISPLAY DEVICE Public/Granted day:2019-01-31
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