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US 7,597,822 B2Granted
Blue phosphor and display panel using the same
AssigneeCanon Kabushiki Kaisha
InventorShoshiro Saruta
Life of this patent
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Abstract
A phosphor represented by a general formula: M1xM22−xSi2O6Raz . . . (1) wherein, M1 and M2 are alkaline earth metals, x<2, Ra is Ce or Eu and 0.005≦z≦0.05), and wherein a variation of y-value of CIE chromaticity relative to the quantity of charge applied per unit area is dy/dQ≦0.0001 and the y-value of CIE chromaticity is y≦0.080.
Claims2
A field emission display panel comprising a phosphor, wherein the phosphor is represented by a general formula
- M1xM22−xSi2O6Raz (1)
- wherein, M1 and M2 are alkaline earth metals, x<2, Ra is Ce or Eu and 0.005≦z≦0.05), and
- wherein a variation of y-value of CIE chromaticity relative to the quantity of charge applied per unit area is dy/dQ≦0.0001 and the y-value of CIE chromaticity is y≦0.080.
A plasma display panel comprising a phosphor, wherein the phosphor is represented by a general formula
- M1xM22−xSi2O6Raz (1)
- wherein, M1 and M2 are alkaline earth metals, x<2, Ra is CE or EU and 0.005≦z≦0.05), and
- wherein a variation of y-value of CIE chromaticity relative to the quantity of charge applied per unit area is dy/dQ≦0.0001 and the y-value of CIE chromaticity is y≦0.080.
Dependencies are inferred from the claim text.