Yttrium—aluminum—garnet-type phosphor
AssigneePanasonic Corporation
InventorsKojiro Okuyama, Takashi Ohbayashi, Seigo Shiraishi
Life of this patent
Estimating the term…
Abstract
It is an object to provide phosphors with high luminance. It also is an object to provide phosphors with less decrease in luminance due to a reduction in particle diameter. A first phosphor is represented by a general formula: aYO3/2.(3−a)CeO3/2.bAlO3/2.cGaO32.fWO3(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦f≦0.020, where 4.00≦b+c≦5.00). A second phosphor is represented by a general formula: aYO3/2.(3−a)CeO3/2.bAlO3/2.cGaO3/2.gK2WO4(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦g≦0.015, where 4.00≦b+c≦5.00).
Claims4
A phosphor represented by a general formula:
- aYO3/2.(3−a)CeO3/2.bAlO3/2.cGaO3/2.fWO3(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦f≦0.020, where 4.00≦b+c≦5.00).
A phosphor represented by a general formula:
- aYO3/2.(3−a)CeO3/2.bAlO3/2.cGaO3/2.gK2WO4(2.80≦a≦2.99, 3.00≦b≦5.00, 0≦c≦2.00, 0.003≦g≦0.015, where 4.00≦b+c≦5.00).
Dependencies are inferred from the claim text.