Title:
LIGHT FLUX CONTROL MEMBER, LIGHT-EMITTING DEVICE, PLANAR LIGHT SOURCE DEVICE AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/151675
Kind Code:
A1
Abstract:
This light flux control member (200) comprises an entry surface (210), a reflective surface (220), a circular groove (230) containing a first circular surface and a second circular surface, and an exit surface (240). The circular groove is disposed in such a manner as not to intersect with the optical path of a light, from being emitted from the center of a light-emitting element (162) and entering at the entry surface, to being reflected at the reflective surface, and, in such a manner as to intersect with at least a portion of the optical path of a light, from being emitted from a point other than the center of the light-emitting element, entering at the entry surface and being reflected at the reflective surface, to reaching the exit surface. The second circular surface is formed in such a manner that the width of the circular groove widens as the opening ridges of the circular groove is approached from the valley portion of the circular groove, and causes a light that is emitted from the light-emitting element, enters the entry surface and is reflected at the reflective surface to be refracted outward.
Inventors:
HIRAKA KENSUKE
Application Number:
PCT/JP2015/055746
Publication Date:
October 08, 2015
Filing Date:
February 27, 2015
Export Citation:
Assignee:
ENPLAS CORP (JP)
International Classes:
F21S2/00; F21V5/00; F21V5/04; G02B17/00; G02F1/13357; H01L33/58; F21Y101/02
Domestic Patent References:
| WO2013037288A1 | 2013-03-21 |
Foreign References:
| JP2013020716A | 2013-01-31 | |||
| JP2011023204A | 2011-02-03 | |||
| JP2009117207A | 2009-05-28 | |||
| JP2010153328A | 2010-07-08 | |||
| JP2014007135A | 2014-01-16 |
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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