| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a variable color light emitting device that can suppress chromaticity variation of mixed color light and can be manufactured at low cost. <P>SOLUTION: A variable color light emitting device 1 has: three kinds of light sources containing a white color light source 2W, a red color light source 2R and a green color light source 2G which are different in chromaticity of emitted light; and a driving driver 4 which can change light output from the light sources. The red color light source 2R and the green color light source 2G are set so that the rate of the distance between the chromaticity of each color light source 2R, 2G and the chromaticity at any color temperature on a black body track on a line passing through a reference chromaticity G<SB POS="POST">b</SB>,R<SB POS="POST">b</SB>set as a reference chromaticity for each color light source 2R, 2G and the chromaticity at the color temperature on the black body track is fixed. The selected light sources 2R, 2G vary the chromaticity of the mixed color light of the three kinds of light sources 2W, 2R, 2G like the reference chromaticities G<SB POS="POST">b</SB>,R<SB POS="POST">b</SB>even when the chromaticities thereof vary. Accordingly, the chromaticity variation of the mixed color light can be suppressed without depending on feedback control or the like, and the device can be manufactured in low cost. <P>COPYRIGHT: (C)2013,JPO&INPIT |
