Patent ID: 7135129

Claim:
An inorganic fluorescent material for solid-state light source, associated with a GaInN heterojunction blue solid-state light source to form white light source, the fluorescent material comprising: oxides of rare earth metal elements, Ga and Al, wherein ions of the group consisting of Dy, Yb and Er are added in cationic cells, oxides of Al, Ga, Sc and In are added in anionic cells, the anionic cells and cationic cells combining to form a compound represented by the following general formula: (Y 1-x-y-z-q , Gd x , Dy y , Yb z , Er q , Ce p ) α (Al 1-n-m-k , Ga n , Sc k , In l ) β O 12 , wherein α is in the range of about 2.97–3.02, β is in the range of about 4.98–5.02, x is in the range of about 0.2–0.65, y is in the range of about 0.001–0.05, z is in the range of about 0.01–0.05, q is in the range of about 0.001–0.05, p is in the range of about 0.015–0.1, k is in the range of about 0.01–0.6, n is in the range of about 0.01–0.45, and l is in the range of about 0.01–0.1, the short-wavelength light emitted from the GaInN heterojunction blue solid-state light source being mixed with a wide-bandwidth light emitted from the fluorescent material to generate a mixed light of a wavelength of about 535 nm–590 nm.