Patent ID: 7189340

Claim:
A phosphor comprising a host material composed of a compound having a garnet crystal structure represented by the general formula (I): M 1 a M 2 b M 3 c O d (I) wherein M 1 is a divalent metal element, M 2 is a trivalent metal element, M 3 is a tetravalent metal element containing at least Si, a is the number of 2.7 to 3.3, b is the number of 1.8 to 2.2, c is the number of 2.7 to 3.3, and d is the number of 11.0 to 13.0; and Ce as a luminescent center ion and in addition to Ce at least one element selected from the group consisting of Cr, Mn, Fe, Co, Ni, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb are incorporated in said host material.