LIGHT SOURCE HAVING A PLURALITY OF WHITE LEDS WITH DIFFERENT OUTPUT SPECTRUM

PROBLEM TO BE SOLVED: To provide a light source having a controllable color temperature. SOLUTION: A solid state light source having first and second component light sources and an interface circuit and a method for forming the solid state light source are disclosed. The first and second component light sources emit light having first and second color points on the different sides of a black body radiation curve. The first and second component light sources comprise an LED which emits light of a first wavelength, and a layer of light conversion material that converts a part of the light into that of a second wavelength. The interface circuit feeds power to the first and second component light sources so that the solid state light source has a color point closer to the black body radiation curve than the first or second color point is. A third component light source can be included so that a range of white color temperature that can be reached by a light source is expanded. COPYRIGHT: (C)2009,JPO&INPIT