| abstract |
The white light emitting device of the present invention comprises: a blue LED chip having a dominant wavelength of 443 to 455 nm; A red phosphor disposed around the blue LED chip and excited by the blue LED chip to emit red light; A green phosphor disposed around the blue LED chip and excited by the blue LED chip to emit green light, wherein the color coordinates of the red light emitted by the red phosphor are four vertices (0.5448, 0.4544) based on a CIE 1931 color coordinate system. , The color coordinates of the green light emitted by the (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633), the green phosphor emits four vertices (0.1270, 0.8037), based on the CIE 1931 color coordinate system. In areas surrounded by (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030). |