Plasma display unit including lanthnum substituted aluminate phosphor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasaki Aoki, Hiroyuki Kawamura, Kazuhiko Sugimoto, Mitsuhiro Otani, Hiroshi Setoguchi, Junichi Hibino
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Abstract
A blue phosphor composing a blue phosphor player in a plasma display device has a crystal structure of Ba(1-x)EuxMgAl10O17 or Ba(1-x-y)EuxSryMgAl10O17. In this blue phosphor, La substitutes for a proportion of Ba or Sr so as to achieve a high-luminance plasma display device with less luminance deterioration in panel manufacturing processes.
Claims11
A plasma display device comprising a plasma display panel on which a plurality of discharge cells for one of single and multiple colors are disposed and a color phosphor layer corresponding to each of the discharge cells is disposed;
- wherein the phosphor layer has a blue phosphor layer, the blue phosphor layer being composed of blue phosphor having a crystal structure of one of Ba(1-x)EuxMgAl10O17 (0<x<1) and Ba(1-x-y)EuxSryMgAl10O17 (0<x<1, 0<y<1, and 0<x+y<1) in which La substitutes for a proportion of one of Ba and Sr.
A blue phosphor which emits visible light as a result of being excited by ultraviolet rays, the blue phosphor having a crystal structure of one of Ba(1-x)EuxMgAl10O17 (0<x<1) and Ba(1-x-y)EuxSryMgAl10O17 (0<x<1, 0<y<1, and 0<x+y<1) in which La substitutes for a proportion of one of Ba and Sr.
A blue phosphor which emits visible light as a result of being excited by ultraviolet rays, the blue phosphor having a crystal structure of one of Ba(1-x)EuxMgAl10O17 (0<x<1) and Ba(1-x-y)EuxSryMgAl10O17 (0<x<1, 0<y<1, and 0<x+y<1) in which La substitutes for a proportion of one of Ba and Sr and trivalent Eu ions substitute for a proportion of divalent Eu ions.
A method of manufacturing a blue phosphor comprising a step of firing the blue phosphor in an oxidative atmosphere, the blue phosphor being composed of one of Ba(1-x-z)EuxLazMgAl10O17 (0<x<1, 0<z<1, and 0<x+z<1) and Ba(1-x-y-z)EuxSryLazMgAl10O17 (0<x<1, 0<y<1, 0<z<1, and 0<x+y+z<1) which have divalent Eu ions in a ground material;
- wherein the blue phosphor is fired in an oxidative atmosphere so as to change a proportion of divalent Eu ions to trivalent Eu ions.
Dependencies are inferred from the claim text.