公开(公告)号：USRE47891E1

公开(公告)日：2020-03-03

申请号：US15161885

申请日：2016-05-23

Applicant: Enplas Corporation

Inventor： Masao Yamaguchi ,  Shingo Ohkawa

IPC: H01L25/075 ,  H01L33/58 ,  H01L33/48 ,  G02B19/00 ,  G02B3/04 ,  G02B5/02 ,  G02F1/1335 ,  F21Y115/10 ,  F21V5/04

Abstract: A display has a member irradiated by a surface light source device comprising a light diffusion member and emission device. The emission device is provided with a light flux control member having a recess and light control emission face which is configurated so as to satisfy Conditions 1 and 2 in a range at least covering a half-intensity-angular-range. Light emitting element(s) may be sealed. Condition 1 is that relation θ5/θ1>1 is satisfied except for light emitted from a light emitting element toward within an angular-neighbourhood of a standard optical axis of the emission device, and Condition 2 is that value of θ5/θ1 decreases gradually according to increasing of θ1, where θ1 is an emission angle of any light at being emitted from the light emitting element, and θ5 is an emission angle of that light of θ1 at then being emitted from the light control emission face of the light flux control member.