Title:
LIGHT EMITTING DEVICE
Document Type and Number:
Japanese Patent JP2023009476
Kind Code:
A
Abstract:
To provide a light emitting device that emits light having a high light flux.SOLUTION: There is provided a light emitting device 100 including: a light emitting element 20 which has a light emission peak wavelength in a range of 380 nm or more and 500 nm or less; and a wavelength converting member 30 which is disposed on a light emission side of the light emitting element 20 and has a light emitting plane. The wavelength converting member 30 includes: a ceramic composite 31 which includes an inorganic fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 570 nm or less and an inorganic oxide; and a translucent thin film 32 which is disposed on a light emission side of the ceramic composite 31 and has a refractive index smaller than the refractive index of the ceramic composite 31. The translucent thin film 32 is a single layer having a physical film thickness in a range of 82 nm or more and 140 nm or less. The translucent thin film 32 comprises a fluoride containing at least one kind of an element selected from a group consisting of an alkali metal element, an alkaline earth metal element, and a Group 13 metal element.SELECTED DRAWING: Figure 2
Inventors:
HIRAI TOSHIYUKI
TANAKA GENTARO
TANAKA GENTARO
Application Number:
JP2021112813A
Publication Date:
January 20, 2023
Filing Date:
July 07, 2021
Export Citation:
Assignee:
NICHIA KAGAKU KOGYO KK
International Classes:
H01L33/58; H01L33/50
Attorney, Agent or Firm:
Patent Attorney Corporation Ichizawa / Kawada International Patent Office
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