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Title:
LIGHT-EMITTING DEVICE AND ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/087232
Kind Code:
A1
Abstract:
A light-emitting device (1) is provided with three light-emitting units (10, 20, 30) formed by storing, in packages (13, 23, 33), blue light emitting elements (11, 21, 31) having three different wavelength bands, and outputs white light having a predetermined chromaticity by performing color mixture of output light beams of the three light-emitting units (10, 20, 30). In an xy chromaticity diagram, the chromaticity of each of the output light beams of the three light-emitting units (10, 20, 30) is located at a fixed distance from a predetermined chromaticity, and a difference between the chromaticity for each of the output light beams of the three light-emitting units (10, 20, 30) and the predetermined chromaticity is set to 0.04 or less.

Inventors:
UENO TAKAYA (JP)
MUROFUSHI HITOSHI (JP)
Application Number:
JP2017/039073
Publication Date:
May 09, 2019
Filing Date:
October 30, 2017
Export Citation:
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Assignee:
SANKEN ELECTRIC CO LTD (JP)
International Classes:
F21V19/00; H01L33/00; F21Y115/10
Foreign References:
JP2016219519A2016-12-22
JP2008034188A2008-02-14
JP2011029497A2011-02-10
JP2008034188A2008-02-14
JP2011192738A2011-09-29
JP2016219519A2016-12-22
Other References:
See also references of EP 3511618A4
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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