| abstract |
[Issue] An apparatus can provide a wide color reproduction region. [Solution Means] A red nitride phosphor of formula (I) or (II), and two green phosphors of formulas (III) and/or (IV) are included. nM w Al x Si y B z N ((2/3)w+x+(4/3)y+z) :Eu 2+ (I) nM is any of Mg, Ca, Sr and Ba, and 0.5 ¤ w ¤ 3, x = 1, 0.5 ¤ y ¤ 3 and 0 ¤ z ¤ 0.5, nM p Si q N ((2/3)p+(4/3)q) :Eu 2+ (II) n1.5 ¤ p ¤ 2.5 and 4.5 ¤ q ¤ 5.5, nM x MgSi z O a X b :Eu 2+ (III) nM is any of Ca, Sr, Ba, Zn and Mn, X is any of F, Cl, Br and I, and 6.5 ¤ x < 8.0, 3.7 ¤ z ¤ 4.3, a = x + 1 + 2z - b/2 and 1.0 ¤ b ¤ 1.9, nSi c Al d O f N g :Eu 2+ (IV) nc + d = 6, 5.0 ¤ c < 6, 0 < d ¤ 1.0, 0.001 < f ¤ 1, 7 ¤ g < 8. |