Title:
LIGHT-EMITTING APPARATUS AND ILLUMINATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/188921
Kind Code:
A1
Abstract:
Provided is a light-emitting apparatus and an illumination apparatus. This light-emitting apparatus comprises: a light-emitting element having an emission peak wavelength of 430 nm to 470 nm; and a fluorescent member containing a first fluorescent body having an emission peak wavelength of at least 510 nm to 590 nm exclusive, and a second fluorescent body having an emission peak wavelength of 590 nm to 670 nm and including a first fluoride fluorescent body having a composition included in the compositional formula represented by formula (1). The light-emitting apparatus satisfies condition (A) or (B). Formula (1): A1
c[M1
1-aMnaFb] (In formula (1), A1 includes K; M1 includes Si and Al; a and b satisfy 0 < a < 0.2 and 5 < b < 7, and c is the absolute value of the electric charge of [M1
1-aMnaFb] ions.) Condition (A): General color rendering index Ra is in the range from 80 to 90 and color rendering index R9 is 50 to 90. Condition (B): General color rendering index Ra is in the range from 80 to 87 and color rendering index R9 is 50 or more.
Inventors:
FUJIO KAZUSHIGE (JP)
MATSUMOTO MIKA (JP)
MATSUMOTO MIKA (JP)
Application Number:
PCT/JP2023/005107
Publication Date:
October 05, 2023
Filing Date:
February 15, 2023
Export Citation:
Assignee:
NICHIA CORP (JP)
International Classes:
H01L33/50; F21S2/00; F21V3/08; H01L33/00
Foreign References:
| JP2012178574A | 2012-09-13 | |||
| JP2011176276A | 2011-09-08 | |||
| JP2009528429A | 2009-08-06 |
Attorney, Agent or Firm:
ICHIZAWA, KAWADA & ASSOCIATES (JP)
Download PDF:
Previous Patent: SCREW PIECE ASSEMBLY ERROR DETECTING DEVICE, SCREW PIECE ASSEMBLY ERROR DETECTING METHOD, AND COMPUT...
Next Patent: MEMBER
Next Patent: MEMBER