Patent ID: 7208102

Claim:
A plasma display device comprising: a plasma display panel including discharge cells corresponding to colors, respectively, and phosphor layers of the colors, respectively, said phosphor layers being excitable by ultraviolet rays to emit light, wherein said phosphor layers include a blue phosphor layer formed of a compound expressed by one of Ba 1−x MgAl 10 O 17 :Eu x and Ba 1−x−y Sr y MgAl 10 O 17 :Eu x , with said compound including at least one of (i) a pentavalent ion of Nb, (ii) a pentavalent ion of Ta, (iii) a pentavalent ion of P, (iv) a pentavalent ion of As, (v) a pentavalent ion of Sb, (vi) a pentavalent ion of Bi, (vii) an ion of Pr, and (viii) an ion of Tm substituting for a part of one of Al and Mg, and with 0.03≦x≦0.2 and 0.1≦y≦0.5.