LED light-emitting device and indicator provided with the LED light emitting device

摘要

A first LED emits visible light of an emission 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 blackbody radiation locus is at most 0.02 and the color temperature is within a range of from 2,500K to 10,000K, and the deviation duv from the blackbody radiation locus is larger than 0.02, and a second LED emits visible light of an emission color such that with respect to the above chromaticity diagram, the chromaticity is exterior to the prescribed white light region, and the deviation duv from the blackbody radiation locus is smaller than −0.02.

主权项

1. An LED light emitting device which radiates a combined light obtained by combining visible light emitted from first LED and visible light emitted from second LED, comprising: a drive controller unit that respectively controls a first drive current to be supplied to the first LED and a second drive current to be supplied to the second LED, wherein
the first LED emits visible light of an emission 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 a blackbody radiation locus is at most 0.02 and the color temperature is within a range of from 2,500 K to 10,000 K, and the deviation duv from the blackbody radiation locus is larger than 0.02, and the second LED emits visible light of an emission color such that with respect to the CIE (1976) L*u*v* color space chromaticity diagram, the chromaticity is exterior to the prescribed white light region, and the deviation duv from the blackbody radiation locus is smaller than −0.02.