White light emitting diode with yellow, green and red light emitting phosphor

1. 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,

wherein 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

wherein the red light emitting phosphor is a nitride-based phosphor composed of Sr, Ca, Ba)AlSiN:Eu, Re

wherein the Eu represents a basic doping, Re represents rare earth co-doping and the mixing ratio of the yellow, green, and red light emitting phosphors is set in the range of: 0.5≦yellow light emitting phosphors <1, 0.01≦green light emitting phosphors ≦0.04, and 0.01<red light emitting phosphors ≦0.1 (here, yellow light emitting phosphors+green light emitting phosphors+red light emitting phosphors=1).

2. The white LED according to claim 1 , wherein the yellow, green, and red light emitting phosphors are mixed and scattered.

3. The white LED according to claim 1 , wherein the yellow, green, and red light emitting phosphors are sequentially laminated in the form of layer.

4. The white LED according to claim 1 , wherein the yellow, green, and red light emitting phosphors are mixed with a molding material and are then coated.

5. The white LED according to claim 4 , wherein the molding material is formed of any one selected from the group consisting of silicon, hybrid, epoxy, and polyvinyl-based resin.