WHITE LIGHT EMITTING DIODES WHICH EMBODIES WHITE LIGHT OF A HIGH COLOR RENDERING PROPERTY INCLUDING A SPECIFIC PHOSPHOR

摘要

PURPOSE: White light emitting diodes are provided to exhibit a high color rendering property with a high color rendering index as well as a correlated color temperature by further including the phosphor of a specific composition to a yellow phosphor.;CONSTITUTION: White light emitting diodes comprise a blue excitation light source and a phosphor. The phosphor includes a phosphor having a light emitting wavelength of 550~600 nm, an oxynitride-based phosphor represented by chemical formula 1: BaSi2O2N2 : xEu^(2+), and a phosphor having a light emitting wavelength of 600~650 nm. The phosphor is one or more selected from Sr_(3-x)SiO_5 : yEu^(2+)(0 x =1, 0 y =1), SiAlON : Eu^(2+), and chemical formula 2: yCe^(3+).;COPYRIGHT KIPO 2011