Title:
LIGHT FLUX CONTROL MEMBER, LIGHT-EMITTING DEVICE, SURFACE LIGHT SOURCE DEVICE AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/061370
Kind Code:
A1
Abstract:
This light flux control member is a light flux control member for controlling light distribution of light emitted from a light-emitting element, and has an incidence surface that is an inner surface of a recessed part formed on the back side so as to cross a central axis of the light flux control member, and an emission surface disposed on the opposite side to the incidence 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.
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Inventors:
HIRAKA KENSUKE
Application Number:
PCT/JP2016/079271
Publication Date:
April 13, 2017
Filing Date:
October 03, 2016
Export Citation:
Assignee:
ENPLAS CORP (JP)
International Classes:
G02B3/00; F21S2/00; F21V5/00; F21V5/04; G02B13/00; G02B13/18; H01L33/58; F21Y115/10
Domestic Patent References:
| WO2013094599A1 | 2013-06-27 |
Foreign References:
| JP2009044016A | 2009-02-26 | |||
| JP2011221190A | 2011-11-04 | |||
| JP2009542017A | 2009-11-26 |
Attorney, Agent or Firm:
WASHIDA, Kimihito (JP)
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