WHITE LIGHT EMITTING DEVICE AND LIGHTING FITTING FOR VEHICLES USING THE WHITE LIGHT EMITTING DEVICE

摘要

It is an object to provide a white light emitting device capable of emitting white light, which has a high luminosity factor and is in the range of chromaticity regulations of a white light source for a vehicle lamp, at high emission intensity by using a semiconductor light emitting element and a phosphor that is efficiently excited by light emitted from the semiconductor light emitting element and emits light, and a vehicle lamp using the white light emitting device. There is provided a white light emitting device that includes a semiconductor light emitting element that has a peak of an emission spectrum in a range of 370 nm to 480 nm, and at least one kind of phosphor that is excited by light emitted from the semiconductor light emitting element to emit visible light, wherein the phosphor is represented by the formula: Sr 1-x- yBa x SiO 2 N 2 :Eu 2+ y , wherein x is in the range of 0.3 < x < 1.0, y is in the range of 0.03 < y < 0.3, and x + y is in the range of x + y < 1.0, and a vehicle lamp using the while light emitting device.