Antonelli, Terry, Stout & Kraus, LLP
Green-emitting phosphor and image display device using the same
Green-emitting phosphor having a composition formula represented by (Y1-x-aGdxMa)3-3yTb3y(Al1-zGaz)5O12, where 0<x&lE;1, 0&lE;a<1, 0<x+a&lE;1, 0<y<1 and 0&lE;z&lE;1 and M is at least one of Sc, Yb and La, improves emission color of phosphors of Y3(Al, Ga)5O12:Tb series, and in case that y=0.07, z=0.4 and a=0 in the foregoing composition, color y is increased with increasing Gd concentration, when Gd concentration x is changed, and the emission color becomes clear green.
Hitachi, Ltd.
H C C H
H01J C09K C09K H01J
inventional inventional inventional inventional
Masatoshi Hiromichi Masaaki Shin
Shiiki Yamada Komatsu Imamura