LED LIGHT EMITTING DEVICE AND INDICATOR COMPRISING LED LIGHT EMITTING DEVICE

摘要

Disclosed is an LED light emitting device, with which it is possible to achieve clear changes in emitted light color across the entire range of fluctuations of emitted light color, and to obtain highly distinctive emitted light color even in an intermediate region of fluctuations of emitted light color. An LED light emitting device which radiates a synthetic light of visible light emitted by first and second LEDs comprises a drive controller unit that respectively controls the drive currents of the first and second LEDs. The first LED emits visible light of an emitted light color such that, with respect to a CIE (1976) L*u*v color space chromaticity diagram, the chromaticity is exterior to a prescribed white light region wherein the absolute value of a deviation duv from the black body radiation track is 0.02 or less and the color temperature is 2500K-10,000K, and the deviation duv from the black body radiation track is greater than 0.02. The second LED emits visible light of an emitted light color such that, with respect to said chromaticity diagram, the chromaticity is exterior to a prescribed white light region, and the deviation duv from the black body radiation track is less than -0.02.