Patent ID: 7144130

Claim:
An illumination apparatus that emits light of a particular color temperature by emitting light from a red LED, a green LED, and a blue LED, comprising: a plurality of color temperature setting circuits, each color temperature setting circuit being connected to one of the red LED, the green LED, and the blue LED, each of the red LED, the green LED, and the blue LED being supplied with a driving current; and a light control circuit that supplies a light control voltage to each color temperature setting circuit; and a bundle of fibers, comprising a plurality of fibers which are each associated with one of the red LED, the green LED, and the blue LED, the bundle of fibers combining lights emitted by the red LED, the green LED and the blue LED, wherein each color temperature setting circuit comprises a color temperature setter that generates an adjusted control voltage from the light control voltage in accordance with a predetermined ratio, and a constant current circuit that outputs a driving current corresponding to the adjusted control voltage to a connected LED, wherein each color temperature setting circuit comprises an internal power supply and a switch which alternately supplies the light control voltage and a voltage from the internal power supply to the color temperature setter.