Title:
LIGHT FLUX CONTROL MEMBER, LIGHT EMITTING DEVICE AND ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/054226
Kind Code:
A1
Abstract:
A light flux control member (140) has a first light flux control member (141) and a second light flux control member (142) facing the first light flux control member (141). The first light flux control member (141) and the second light flux control member (142) both have central axes which coincide with an optical axis (LA) of a light emitting element. In an inclined Fresnel lens (162) of the first light flux control member (141), the distance from troughs between annular projections (162a) to a lower side step (151) in the optical axis (LA) direction is small for outer troughs, and gradually increases for troughs closer to the optical axis (LA). According to the present invention, a light flux control member which, from among the front, side, and rear, is capable of balanced distribution of light in at least two of those directions, a light emitting device, and an illumination device can be provided.
Inventors:
NAKAMURA MASATO
Application Number:
PCT/JP2013/005361
Publication Date:
April 10, 2014
Filing Date:
September 11, 2013
Export Citation:
Assignee:
ENPLAS CORP (JP)
International Classes:
F21S2/00; F21V7/00; F21Y101/02
Foreign References:
| JP2011175978A | 2011-09-08 | |||
| JP2012185949A | 2012-09-27 | |||
| JP2012048950A | 2012-03-08 | |||
| JP2003258319A | 2003-09-12 |
Other References:
See also references of EP 2905529A4
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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