Patent ID: 7345418

Claim:
A phosphor mixture, comprising: a red phosphor expressed by a composition formula of MmAaBbOoNn:Z (where an element M indicates one or more kinds of elements having a valency of II, an element A indicates one or more kinds of elements having a valency of III, an element B indicates one or more kinds of elements having a valency of IV, O indicates oxygen, N indicates nitrogen, an element Z indicates elements serving as an activator in the phosphors, and m=a=b=1, o<0.5, n=3−⅔o); an orange phosphor having a maximum peak of an emission spectrum in the wavelength range of 570 to 630 nm; a green phosphor having a maximum peak of the emission spectrum in the wavelength range of 500 to 570 nm; and a blue phosphor having a maximum peak of the emission spectrum in the wavelength range of 440 to 500 nm.