Plasma picture screen with red phosphor
AssigneeKoninkiljke Phillips Electronics N.V.
InventorsThomas Jüstel, Walter Mayr, Hans Nikol
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Abstract
A plasma picture screen fitted with a phosphor layer comprising a red phosphor activated by Eu3+ shows an improved red color point (x≧0.64 and y≦0.35) and shorter decay times τ1/10 as compared with the standard phosphor (Y,Gd)BO3. The phosphor according to the invention has a lattice in which the activator Eu3+ occupies a location which has no inversion symmetry.
Claims3
A plasma picture screen provided with a phosphor layer which comprises a red EU3+—activated phosphor, which screen has a host lattice with a crystal structure in which the EU3+ cations occupy locations without inverse symmetry and wherein the phosphor is selected from the group of phosphors consisting of Ba2Gd2(SixGe1-x)4O13::Eu, (YxGd1-x)NbO4:Eu, (YxGd1-x)OF:Eu, (YxGd1-x)OCl and (ScxLu1-x)2Si2O7, in all said phosphors 0≦x≦1.
Dependencies are inferred from the claim text.