Patent ID: 6960309

Claim:
A plasma display device having a plasma display panel in which a plurality of discharge cells having one of one and a plurality of colors are disposed, phosphor layers having a color corresponding to said respective discharge cells are disposed, and said phosphor layers are excited by ultraviolet light to emit light, wherein said phosphor layers have a blue phosphor, and said blue phosphor is made of one of compounds represented by Ba 1-x MgAl 10 O 17 :Eu x and Ba 1-x-y Sr y MgAl 10 O 17 :Eu x , wherein 0.03≦x≦0.25 and 0.1≦y≦0.5, and containing at least one of Ti, Zr, Hf, Si, Ge, Sn, and Ce substituting for part of one of elements Al and Mg.