Title:
LIGHT-EMITTING DEVICE, SURFACE LIGHT SOURCE DEVICE AND LIGHT FLUX CONTROL MEMBER
Document Type and Number:
Japanese Patent JP2019040859
Kind Code:
A
Abstract:
To provide a light-emitting device capable of preventing luminance unevenness resulting from light emitted downward from an emission surface, to transmit light to a distant place.SOLUTION: A light flux control member of a light-emitting device has an incident surface, a rear surface, a reflection surface, an emission surface, and a first recess part. The first recess part comprises a first inclination surface inclined toward a front side as separating from an optical axis. A front side end part of the first inclination surface is positioned in a direction along the optical axis, on a rear side with respect to light emitted from a center of a light-emitting surface of a light-emitting element, made incident on the incident surface, reflected on the reflection surface and head toward the emission surface, and on a front side with respect to light emitted from an end part of the light-emitting surface of the light-emitting element, made incident on the incident surface and directly heading toward the emission surface not via the reflection surface.SELECTED DRAWING: Figure 7
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Inventors:
YAMADA KYOHEI
TAKIZAWA MASAYO
TAKIZAWA MASAYO
Application Number:
JP2018150228A
Publication Date:
March 14, 2019
Filing Date:
August 09, 2018
Export Citation:
Assignee:
ENPLAS CORP
International Classes:
F21S2/00; F21V5/00; F21V5/04; G02B5/02; G02B5/08; G02F1/13357
Attorney, Agent or Firm:
Koichi Washida