Patent ID: 7528537

Claim:
A phosphor, comprising fluorescent substances I and II, wherein the fluorescent substance I contains silicate and Mn as an activator and the fluorescent substance II contains a compound represented by the formula (1) or a compound represented by the formula (2) and Tb as the activator: (M 1 1−a M 2 a )(Mg 1−b−c Zn b )Al 11−d Mn c+d O 19−(a+d)/2 (1) wherein, in formula (1), M 1 is selected from the group consisting of La, Y, Gd, and mixtures thereof, M 2 is selected from the group consisting of Ca, Sr, Ba, and mixtures thereof, a is not less than 0 and not more than 0.6, b is not less than 0 and not more than 1, c is not less than 0 and not more than 0.5, d is not less than 0 and not more than 0.5, b+c is not more than 1, and c+d is more than 0 and not more than 0.5, M 3 2 O 3 .m Al 2 O 3 .n B 2 O 3 (2) wherein, in formula (2), M 3 is selected from the group consisting of La, Y, Gd, and mixtures thereof, m is not less than 2.5 and not more than 4.5 and n is not less than 3.5 and not more than 5.5.