Patent ID: 7850869

Claim:
A phosphor, comprising a host material with luminescent center represented by the general formula Ln a M b O 12-z1 F z1 :R z2 M′ z1 , wherein, Ln is at least two metal elements selected from the group consisting of Sc, Y, La, Pr, Nd, Gd, Ho, Yb and Sm, 2.6≦a≦3.4; M is at least one metal element selected from the group consisting of B, Al and Ga, 4.5≦b≦5.5; O and F are related in the ratio of “12-z1” to “z1”, where 0.001≦z1≦0.3; R is at least one metal element selected from the group consisting of Ce and Tb; M′ is at least one metal element selected from the group consisting of Ca, Sr, Ba, Mn and Zn; and R and M′ are related in the ratio of “z2” to “z1”, where 0.003≦z2≦0.1; “z2+z1=x”; and 0.004≦x≦0.4.