Patent ID: 7808012

Claim:
A group of phosphor particles for a light-emitting device containing, in addition to divalent-europium-activated nitride red phosphor particles expressed in (MI 1-a Eu a )MIISiN 3 with a median diameter R1, at least one type of: divalent-europium-activated oxynitride green phosphor particles of beta sialon expressed in Eu b Si c Al d O e N f with a median diameter G1; divalent-europium-activated oxynitride yellow phosphor particles of alpha sialon expressed in MII g Eu h Si i Al j O k N l with a median diameter Y1; and trivalent-cerium-activated silicate green phosphor particles expressed in MIV 3 (MV 1-m Ce m ) 2 (SiO 4 ) 3 with a median diameter G2, wherein MI represents at least one element selected from Mg, Ca, Sr and Ba, MII represents at least one element selected from Al, Ga, In, Sc, Y, La, Gd and Lu, MIII represents at least one element selected from Li, Na, K, Rb, Cs, Mg, Ca, Sr and Ba, MIV represents at least one element selected from Mg, Ca, Sr and Ba, and MV represents at least one element selected from Al, Ga, In, Sc, Y, La, Gd and Lu, conditions of 0.001≦a≦0.10; 0.005≦b≦0.4; c+d=12; e+f=16; 0<g≦3.0; 0.005≦h≦0.4; i+j=12; k+l=16; and 0.005≦m≦0.5 are satisfied, and conditions of 1.3≦R1/G1≦4.0; 1.3≦R1/Y1≦4.0; and 1.3R1/G2≦4.0 are satisfied.