Patent ID: 10008643

Abstract:
A light emitting device comprises a light emitting element having an emission peak wavelength in a wavelength range of 430 nm to 470 nm, and a phosphor material comprising at least one type of phosphor selected from the group consisting of a first phosphor and a second phosphor, a third phosphor, a fourth phosphor, and a fifth phosphor having respective compositions represented by formulas (I)-(V): (x−s)MgO.(s/2)Sc2O3.yMgF2.uCaF2.(1−t)GeO2.(t/2)Mt2O3:zMn4+  (I)A2[M1−pF6]:pMn4+  (II)Lu3Al5O12:Ce  (III)(Sr,Ca)AlSiN3:Eu  (IV)(Ca,Sr,Ba)8MgSi4O16(F,Cl,Br)2:Eu  (V) In the formulas (I)-(V), Mt is at least one of Al, Ga, and In; x, y, z, s, t, and u each satisfy 2≤x≤4, 0<y<1.5, 0<z<0.05, 0≤s≤0.5, 0<t<0.5, and 0≤u<1.5; A is at least one of K, Li, Na, Rb, Cs, and NH4; M is at least one type of element from group 4 elements and group 14 elements; and p satisfies 0<p<0.2.