Patent ID: 7258816

Claim:
A nitride phosphor having a general formula L X M Y N ((2/3)X+(4/3)Y) :R or a general formula L X M Y O Z N ((2/3)X+(4/3)Y−(2/3)z) :R in which X, Y and Z are 0.5≦X≦3, 1.5≦Y≦8, and 0<Z≦3, L is at least one or more elements selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more elements selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more elements selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu, said nitride phosphor absorbing at least a portion of light having a first luminescence spectrum in which a peak wave length is 500 nm or less and emitting light having a second luminescence spectrum which has at least one or more of peaks at a range of 520 to 780 nm is characterized in further containing at least one or more of different elements selected from the Group consisting of Li, Na, K, Rb and Cs.