Patent ID: 8253321

Claim:
A halide phosphor powder for a warm-white light emitting diode, the halide phosphor powder comprising: a low-color-temperature phosphor powder of halide nitride based on garnet of rare earth oxides and having cerium as an activating agent, chloride (Cl −1 ) and nitrogen ion (N −3 ) are added to a composition of the phosphor powder and a stoichiometric relationship of the composition is (ΣLn +3 ) 3 Al 2 [(Al(O 1-2p Cl p N p ) 4 ] 3 , wherein ΣLn=at least one element selected from a group consisting of Y, Gd, Tb, Lu, Dy, Pr, and Ce, the chemical parameter in the stoichiometric relationship is 0.001≦p≦0.2; wherein, in a composition of a cation lattice, rare earth ions of the low-color-temperature phosphor powder are selected from a group consisting of 0.001≦(Y/ΣLn)≦0.5, 0.5≦(Gd/ΣLn)≦0.95, 0≦(Tb/ΣLn)≦0.1, 0≦(Lu/ΣLn)≦0.05, 0≦(Dy/ΣLn)≦0.05, 0.0001≦(Pr/ΣLn)≦0.01 and 0.01≦(Ce/ΣLn)≦0.1.