Patent ID: 8089084

Claim:
A light emitting device, comprising: a light emitting diode configured to emit light; and a phosphor configured to change a wavelength of the light emitted from the light emitting diode, the phosphor covering at least a portion of the light emitting diode; wherein said phosphor comprises a compound including a host material and an activator, wherein divalent copper ions and oxygen are components of the host material, wherein the compound has the formula a (M′O) b (M″O) c (Al 2 O 3 ) d (M′″ 2 O 3 ) e (M″″O 2 ) f (M′″″ x O y ) wherein M′ is Cu, or a combination of Cu and Pb; M″ is Be, Mg, Ca, Sr, Ba, Zn, Cd, Mn, or any combination thereof; M′″ is B, Ga, In, or any combination thereof; M″″ is Si, Ge, Ti, Zr, Hf, or any combination thereof; M′″″ is Bi, Sn, Sb, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or any combination thereof; 0<a≦1; 0≦b≦2; 0<c≦8; 0≦d≦1; 0≦e≦1; 0<f≦2; 1≦x≦2; and 1≦y≦5.