Title:
発光装置、照明装置及び光学部材
Document Type and Number:
Japanese Patent JP7214957
Kind Code:
B2
Abstract:
To provide a lighting device capable of switching a light distribution angle without using mechanical means, and a light emitting device and an optical member using the lighting device.SOLUTION: A light emitting device 50 comprises: one or more of first light emitting elements 11; one or more second light emitting elements 12; a first condensing unit 22 that is arranged at a position corresponding to the first light emitting element 11 and condenses light incident from the first light emitting element 11; a second condensing unit 23 that is arranged around the first condensing unit 22 and condenses the light emitted from the first light emitting element 11 and not incident on the first condensing unit 22; and a first light guide unit 24 that is arranged around the second light condensing unit 23 and arranged at a position corresponding to the second light emitting element 12, and totally reflects light incident from the second light emitting element 12 inside to guide the light. A half-value angle of light emitted from the first light guide unit 24 is larger than a half-value angle of the light emitted from the first light condensing unit 22.SELECTED DRAWING: Figure 2A
Inventors:
Kohei Shima
Yohei Kono
Yohei Kono
Application Number:
JP2018205312A
Publication Date:
January 31, 2023
Filing Date:
October 31, 2018
Export Citation:
Assignee:
Nichia Corporation
International Classes:
F21S8/02; F21V3/00; F21V3/02; F21V5/00; F21V5/04; F21V15/01; H01L33/58; H01L33/60
Domestic Patent References:
| JP2013131442A | ||||
| JP3172217U | ||||
| JP2017208261A | ||||
| JP2014146563A |
Attorney, Agent or Firm:
Hyuga Temple Masahiko
Junichi Kozaki
Hiroshi Ichikawa
Satoshi Shirai
Uchida Keito
Junichi Kozaki
Hiroshi Ichikawa
Satoshi Shirai
Uchida Keito