White light emitting diode

A white light emitting diode (LED) comprising:

• a blue LED chip;
• and
• yellow, green, and red light emitting phosphors that are coated on the blue LED chip at a predetermined mixing ratio and converts light, emitted from the blue LED chip, into white light,
• wherein the yellow light emitting phosphor is a silicate-based phosphor,
• the green light emitting phosphor is a silicate-based phosphor composed of (Ba, Sr, Ca, Mg)2SiO4:Eu, Re or a sulfide-based phosphor composed of (Sr, Ca)Ga2S4:Eu, Re,
• the silicate-based phosphor composed of (Ba, Sr, Ca, Mg)2SiO4:Eu, Re includes at least two elements of Ba, Sr, Ca, and Mg,
• Re (rare earth elements) includes at least one of Y, La, Ce, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, F, Cl, Br, and I,
• the red light emitting phosphor is a nitride-based phosphor composed of (Sr, Ca, Ba)AlSiNx:Eu, Re (1≦x≦5) or a sulfide-based phosphor composed of (Sr, Ca)S:Eu, Re,
• the nitride-based phosphor composed of (Sr, Ca, Ba)AlSiNx:Eu, Re (1≦x≦5) includes at least one of Sr, Ca, and Ba,
• Re includes at least one of Y, La, Ce, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, F, Cl, Br, and I, and
• the doping level of Re is set in the range of 1 to 50000 ppm.