Patent ID: 7476334

Claim:
A plasma display unit comprising: a front panel having a plurality of display electrode pairs disposed on a glass substrate; a rear panel in a confronting arrangement via discharge space, having a plurality of address electrodes that forms discharge cells in combination with the display electrode pairs; and a phosphor layer for emitting by discharging, comprising a main material including a first oxide, and a second oxide containing an element with electronegativity larger than the oxide included in the main material; wherein the surface of the phosphor layer would bear a positive (+) charge if the phosphor layer were formed without the second oxide, the second oxide is added such that the absolute value of the charge of the phosphor layer does not exceed 0.01 μC/g, and the main material including the first oxide is formed of an aluminate-based green phosphor of BaAl 12 O 19 :Mn 2+ .