LIGHT EMITTING DEVICE AND LIGHTING FIXTURE USING IT

摘要

A GaN LED (1) and a fluorescent element (2) for emitting fluorescence (visible light) L2 on being excited by light L1 emitted from the LED (1) are combined to form a light emitting device that uses the fluorescence L2 as an output light. The LED (1) and the fluorescent element (2) are so selected and combined that a change amount in chromaticity of an output light is within 0.05 on an x-y chromaticity chart when a drive current to be supplied to the LED (1) is changed from 0.1(A/cm2) to 70.0(A/cm2) per unit light emitting area. A white lighting fixture suppressed in color tone is obtained by using a high-efficiency InGaN ultraviolet LED for the LED (1) and a white fluorescent element for the fluorescent element.