A switching power source apparatus can reduce the size of a transformer and realize the zero-voltage switching of a switch. Light emitting devices including such phosphors may emit warm white light. Each component wavelength modulating section has a portion of a monochrome transmissive liquid crystal modulator panel that has been segmented into at least a first, a second, and a third spatially separate portion. An interpolation reference frame is determined, formed of a smallest square, which contains the interpolation point Q and with which the four vertices are formed by lattice points of the designated color, and an interpolation origin, constituted by the upper left lattice point of the interpolation reference frame, interpolation proportions d* and e* are determined.