Patent ID: 8646947

Claim:
A multicolor illumination device comprising: a first light source emitting a first light; a second light source emitting a second light; a wavelength conversion element having at least two segments, including a first segment free of any wavelength conversion material, and a second segment carrying a first wavelength conversion material which absorbs the first light and converts the absorbed first light into a third light having longer wavelengths than the absorbed first light; optical elements for introducing the first and second lights onto the wavelength conversion element as incident lights, wherein the wavelength conversion element is moveable relative to the first and second light sources so that the first and second segments are alternatingly disposed in paths of the incident lights; an output port disposed to receive lights outputted from the wavelength conversion element; and means for allowing lights originating from the first light to be output to the output port while preventing lights originating from the second light to be output to the output port during a first time period, and for allowing lights originating from the second light to be output to the output port while preventing lights originating from the first light to be output to the output port during a second time period, wherein the first time period is a time period when the second segment of the wavelength conversion element is disposed in the paths of the incident lights, and the second time period is a time period when the first segment of the wavelength conversion element is disposed in the paths of the incident lights, and wherein the first and second time periods do not overlap in time.