Patent ID: 11867380
Assignee: NICHIA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  C  G  H | IPC C  F

Claim 0:
1. A wavelength conversion member comprising a support and a wavelength conversion layer, the wavelength conversion layer being disposed on the support and containing phosphors;
the phosphors including:
a first phosphor having a composition represented by Formula (1), and having an emission peak wavelength in a wavelength range from 550 nm to 620 nm; and
a second phosphor having a different emission peak wavelength and/or a full width at half maximum from the first phosphor;
wherein an amount of the first phosphor in the wavelength conversion layer is in a range from 20 mass % to 80 mass % relative to a total amount of the phosphors:

LapCeqM1rSi6N8  (1)

where in Formula (1), M1 represents at least one selected from the group consisting of rare earth elements other than La and Ce, a total molar content percentage of Y, Gd, and Lu in M1 is 90% or more, and p, q, r, and s satisfy: 2.7≤(p+q+r)≤3.3, 0≤r≤1.2, 10≤s≤12, and 0<q≤1.2.