Patent ID: 8847507
Filing Date: 2014-09-30
Classification: F21K,H01L,H05B

Abstract:
1. An illuminating device comprising: three or more solid-state light-emitting devices, each of which comprises a semiconductor light-emitting element and a phosphor, and emits a primary light on the basis of an emission from the semiconductor light-emitting element and an emission from the phosphor which is excited by said emission from the semiconductor light-emitting element to fluoresce, or on the basis of an emission from the phosphor which is excited by an emission from the semiconductor light-emitting element to fluoresce; and an emission intensity control part which controls electric power to be supplied to each of the three or more solid-state light-emitting devices and thereby controls a color of a synthesized light which is synthesized from the primary lights emitted by the three or more solid-state light-emitting devices, wherein the three or more solid-state light-emitting devices each have an emission color, the deviation duv of which from a blackbody radiation locus being within a range of −0.02≦duv≦0.02, in the uv chromaticity diagram according to USC (u,v) color system (CIE 1960), and the emission intensity control part controls each of the three or more solid-state light-emitting devices to regulate the color of the synthesized light so as to result in a chromaticity point, which is located on straight lines connecting a plurality of chromaticity points respectively corresponding to the emission colors of the lights from the three or more solid-state light-emitting devices, or which is located within a polygon formed by the straight lines.